Animal research suggests that in male rats the is critical for the ability to engage in sexual behavior, but not for the motivation to do so.
nucleus accumbens
amygdala
medial preoptic area of the hypothalamus
hippocampus

d

explanation:

civil rights vs. civil liberties. civil liberties are basic freedoms while civil rights are the basic right to be free from discrimination based on such characteristics as race, disability, color, gender, national origin, and others. discriminating against an employee on the basis of gender is a civil rights violation.

did mary wollstonecraft believe was a natural ingredient for women’s happiness?

so you should go with

a. strong