A news bulletin reported the following: 'Protesters gathered outside the national parliament yesterday demanding stronger anti-corruption laws. Organisers e...

(a) Two reasons why crowd estimates from different sources often disagree [4]

Any two of the following, each worth [2]:

1. Incentive-driven reporting: Each side has a motivation to report a number that supports its narrative. Protest organisers want to demonstrate the strength of public feeling, so they tend to estimate high. Police may want to minimise the perceived scale of opposition, so they tend to estimate low [1+1].
2. Different counting methods: Aerial photography, ground-level visual estimation, turnstile counts, and mobile phone signal analysis all produce different results. Without a standardised methodology agreed by both sides, estimates will naturally diverge [1+1].
3. Timing differences: The time at which the count is taken matters significantly. People arrive and leave throughout a protest, so peak attendance differs from the average number present at any given moment. An early count and a mid-event count can produce very different figures [1+1].
4. Different area boundaries: Some observers may count only the main gathering point (e.g. the square in front of parliament), while others include surrounding streets and overflow areas. The geographical boundary of the count directly affects the total [1+1].

(b) A merit and a shortcoming of calling the allegations "politically motivated" [4]

Merit [2]: If the allegations genuinely originated from a political rival, highlighting this context alerts the public to the possibility that the evidence was released strategically to damage the government rather than purely to serve justice [1]. Understanding the motive behind a leak is a legitimate part of evaluating its significance [1].

Shortcoming [2]: Dismissing the claims as "politically motivated" does not address the substance of the leaked documents [1]. If senior officials did accept payments from a construction company in exchange for government contracts, then the facts of the corruption remain unchanged regardless of who released the documents or why. The motive of the source does not alter whether the evidence itself is genuine [1].

(c) Two ways citizens could hold government accountable for corruption, other than protests [4]

Any two of the following, each worth [2]:

1. Independent anti-corruption bodies: Support or establish independent commissions or ombudsman offices with the legal authority and resources to investigate officials, subpoena documents, and refer cases for prosecution [1+1].
2. Freedom of information requests: Use freedom of information laws to request documents about government contracts, procurement processes, and public expenditure, creating transparency that makes corruption harder to hide [1+1].
3. Electoral accountability: Vote for opposition candidates who credibly pledge to strengthen accountability mechanisms, independent judiciary, and anti-corruption legislation [1+1].
4. Investigative journalism: Support and protect investigative journalism that exposes wrongdoing through detailed, evidence-based reporting, providing the public with verified information on which to base their political choices [1+1].
5. Legal challenges: Pursue cases through the courts when there is evidence that laws have been broken, using the judicial system to hold individuals accountable regardless of their political position [1+1].