How did black tax affect Trevor's mother when she first got job as a secretary?

A. She wasn't as educated as the white secretaries, so it was harder for her to learn to do her job.
B. Black people weren't allowed to live in the white cities, so she had a long commute to her job which was very tiring.
C. The government took more taxes from her paycheck because she was black, so she made less money than other secretaries.
D. Instead of being able to save for her future she was expected to use her paycheck to help her family

D. Instead of being able to save for her future, she was expected to use her paycheck to help her family.