What was the general public perception of birth control during Margaret Sanger's advocacy?

The general public perception of birth control during Margaret Sanger's advocacy was complex and varied significantly across different social strata and communities. While birth control was indeed illegal in many states due to laws like the Comstock Act of 1873, Sanger worked tirelessly to promote the idea that family planning was essential and that women should have control over their own bodies.

Although many viewed birth control as scandalous and associated it with promiscuity, particularly in the early 20th century, Sanger's efforts contributed to a growing acceptance of the idea among progressive and emerging feminist circles. This aligns with the acknowledgment in the correct answer that it was illegal yet began to find acceptance, especially among those advocating for women's rights and sexual liberation, which suggested a shift in attitudes towards sex and personal autonomy.

The movement was also supported by new ideas about women's roles and rights, leading to a burgeoning discourse surrounding sexuality, health, and personal freedom. Thus, option C reflects the reality of Sanger's time, capturing both the illegality of birth control and the simultaneous rise of more liberal views about sexuality and women's agency.