In the following passage, the numbered gaps indicate missing words. Against each number in the list below the passage, four options are given in columns let...

In the following passage, the numbered gaps indicate missing words. Against each number in the list below the passage, four options are given in columns lettered A to D. Choose the word that is the most suitable to fill the numbered gaps in the passage. 

Hardly a day passes without news of terrible accidents on our roads. Most of the time, these are caused by the ignorance and -71- of drivers. Besides the ignorance of the drivers, most of the vehicles that ply our roads are not -72- vehicles are supposed to be tested annually before certificates are issued. However, vehicle Owners are issued with these certificates even when their vehicles have not been properly -73-. Most of the drivers do not have valid driver's -74 - There are driving schools with qualified -75- to prepare prospective drivers. After a period of training, the prospective drivers are made to go through a road test. It is only when they pass this test that they are -76- to drive. Some drivers never even had a learner's -77- when they were learning to drive. Consequently, they have no knowledge of -78- rules. They are ignorant of what speed -79- means. To them, 100 kilometres per hour may mean minimum speed allowed. Little wonder the -80- on our roads.

Choose the most appropriate option for the gap labelled [....73.....] above