Questions Refer to the Passage Below

Questions refer to the passage below.
"The right to reproductive choice means that women have a right to choose whether or not to reproduce . . . A violation of this right was revealed by a nongovernmental report on widespread pregnancy-based discrimination against women employed in Mexico's export-processing (maquiladora) sector. . . . women applying for work in this sector were routinely required to undergo pregnancy testing for screening, and that employed women were forced to resign when they became pregnant. In some factories, women were obliged to show sanitary napkins to company nurses as a condition of ongoing employment.
The right to family planning education, information, and services is key to reproductive choice, and central to women's sexual and reproductive health, especially given the risk of maternal mortality and the illegality of abortion in many countries."
Dr. Carmel Shalev "Rights to Sexual and Reproductive Health," International Conference on Reproductive Health, Mumbai, India (1998)
-Based upon the passage above, why were women in some Mexican export-processing factories forced to show sanitary napkins to company nurses?

A) They needed to show proof of reproductive ability.
B) They needed to comply with company hygiene standards.
C) They had to prove that they were not pregnant.
D) They needed to reveal that they were not underage workers.