Music is used to convey emotion from the producer of the music to its audience. By using emotion, the musician plays on the heartstrings of the audience, thus persuading them to feel a certain way because of the emotions in the music.
Hope this answers your question.
B is the correct answer, because 'because she wanted to impress her family' is the only clause with an active verb, whereas the other examples either don't have a verb (from scratch because), or it isn't active which means it is a phrase, not a clause (to cook a meal from scratch) or an independent sentence (Jenny tried).
