Answer:
a) A military officer with a high rank or position.
Explanation:
Lieutenant is one of the several positions of leadership, that compose the military career. It is the officer who performs the functions of section chief or fraction commander, and replaces the captain in command of the subunit. In this sense, "lieutenant" is a military officer with a high rank or position.
Is this "All Quiet on the Western Front"?
So you're looking for 2 synonyms. B is the best answer, avert and prevent are synonyms of each other. The other choices are antonyms, or they're at least not synonyms.
The difference is the money