B) is a better definition in general, but it clashes quite a bit with what I would call recent trend(<20 years) from the left of blaming groups of people rather than culture. Its the idea that society is the one that creates unfair distribution of power between groups, and culture the vessel for the perpetuation of it. It did not blame individuals based on their skin or sex, demanded that they fixed society because of privileged position, but rather sought to change cultural norms by causing a change from the inside.