I believe you have a typo when it comes to the first option - it should be athletics, not athletic. The word athletic is an adjective, and the word athletics is a noun.
That being said, the correct answer is A. athletics. Even though this noun ends in -s, it is still singular. The rest of the options are all plural nouns.
She was the first black person to win a grand slam
I think it means improper
b because it is the only one that makes sense
I saw a dog, a cat, and a panda when I went to the zoo.
