Which of the Following Helps Explain Why U

Which of the following helps explain why U.S.women are less likely to pursue careers in scientific and mathematical fields?

A) In high school, girls take fewer advanced math classes than boys.
B) Most girls have significantly less natural aptitude for science and math than do most boys.
C) There are no women professors in the sciences or math, making it difficult for young women to envision themselves succeeding in these areas of study.
D) Some faculty members assume that females have less aptitude in these fields.
E) All of the above.