PART A: Which of the following statements best describes the central idea of the text?

A. Katherine Johnson overcame racial and gender discrimination and became one of the top mathematicians at NASA.

B. Katherine Johnson wanted to work for NASA, but her status as an African American woman prevented her from doing so.

C. Katherine Johnson was responsible for designing the first space probe sent to the Moon.

D. Katherine Johnson had a difficult childhood, but after beginning work at NASA, she faced less discrimination.