33.

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation

According to the meaning of this sentence "Wilma Rudolph is the first American woman to win three gold medals, won the 100m and 200m races and secured her team's victory in the 4x100 relay", so placing and anchoring is a parallel structure, it is the result adverbial of this sentence, the structure is consistent before and after, choose A.