Read the following biographies:
Biography A
"Marie Tharp grew up in the 1930s, wanting to be a surveyor like her father. Although she helped him in his work, women weren’t welcome in the sciences, so she went to music school instead and waited for a chance. When colleges emptied of men during World War II, she was allowed to get a geology degree and then another in mathematics.
"She wanted to investigate the ocean depths, but women weren’t allowed on research ships. So she waited again, this time in a basement office, for her male colleagues to send back data. Working slowly and precisely, she turned those numbers into the most detailed map of the sea floor ever made.
"Marie wanted her colleagues to understand that her depictions of sea floor geography were powerful evidence for the theory of continental drift, but they dismissed it as 'girl talk.' It took almost a decade for her work to be accepted. She’d wait many more years to get full credit.
Biography B
"Rosalind Franklin decided she wanted to be a scientist when she was still a teenager, but her father didn’t believe in higher education for women. She eventually did enroll in the University of Cambridge, but when she graduated in 1941, women were not considered full members of the college and were ineligible for higher-degree awards.
"She went on to conduct groundbreaking work exploring the structure of DNA using x-ray photographs. Although her work was excellent and her research was published in major scientific journals, she had to fight against lower pay and slower promotions than her male peers. At times, others in the lab treated her more as an assistant than a fellow scientist. Franklin also had difficulties collaborating with her colleagues because women were not allowed in the university dining rooms or clubs where theories were shared and debated over meals and drinks.
"Franklin continued her work regardless, capturing the first clear images of DNA in what were later called 'the most beautiful X-ray photographs of any substance ever taken.' Before she could publish her results, however, a male scientist in her lab showed her photographs to two rival researchers, James Watson and Francis Crick. Watson and Crick used what they saw in Franklin’s photos to help them develop their famous model of the double helix of DNA. They were hailed all over the world for their discovery and received a Nobel Prize for it. Rosalind Franklin received a small footnote in their paper."
What is the common theme of both biographies?

A Most men did not want their daughters to become scientists.

B Scientists used to steal research from one another in order to get ahead.

C Women made good scientists because they were patient and worked hard without complaining.

D Women often struggled for acceptance in scientific fields.