Political, social, and economic opportunities are more available to women, ethnic and religious minorities, and other underrepresented populations in
a. cultures that embrace democracy and individual freedoms.
b. cultures that rely on migrant labor.
c. cultures that operate under theocracies.
d. cultures that use command economies.

It's definitely not in a theocracy: those usually favour the majorities.

Also migrant labors don't specifically favour minorities.

Now, between democracies and command economies the choice is very hard, as it depends more on the specific country. So for example in many places the role of the minorities rose in command economies, since they went against the patriarchy (in China this was the case for example, the role of women in China improved drastically, while women and minorities are still struggling in Japan, which is a democracy). On the other hand, Nazi Germany was also a command economy, and yet it was very bad for minorities

I would say that the question is too complex to give just one answer, but I would also argue for option d)