Choose the option that best best completes the gap(s). The _____ robber showed no mercy during the attack?

Choose the option that best best completes the gap(s).

The _____ robber showed no mercy during the attack?

Answer Details

The word that best completes the gap is "ruthless". "Ruthless" means showing no pity or compassion for others and willing to cause harm to achieve one's goals. In the context of the sentence, it means that the robber was merciless and violent during the attack.