Thanks for the question! So this is going to be a main point question, so it’s good to think about what the answer might be in our heads before we take a look at the answer choices. What is this passage talking about?
Well, we’re basically told about how Aida Walker had a version of the cakewalk that could appeal to different audiences and their different desires. That’s the big picture idea, and that’s what’s summed up pretty well in (C), which tells us that she popularized the cakewalk by capitalizing on the complex cultural mix that had developed from the original blend of satire and cultural preservation, together with the effects of later parodies. That draws in claims from throughout the whole passage, and makes it the correct answer.
(B), on the other hand, is too narrow. Though we do talk about how Walker’s able to give the dance broad appeal because she distilled what was regarded as the most authentic version in an era that valued authenticity highly, we’re told this in lines 45-49 only, so this is just pulling from one part of the entire passage. It leaves out other parts that are pretty important to the passage as a whole, and so just doesn’t encompass enough to be the main point.
Hope this helps! Feel free to ask any other questions that you might have.