PART A: Which of the following describes the central claim of the text?

A.
Grotjan was an amazing mathematician who should have been more famous.

B.
By working as a cryptanalyst for the United States government, Grotjan opened up job opportunities for other women during the war.

C.
Grotjan's initial discovery allowed the United States to crack additional codes and helped them in the war.

D.
Many people didn't take Grotjan's discovery seriously at first, because women were not considered skilled with numbers.

C. Grotjan's initial discovery allowed the United States to crack additional codes and helped them in the war.