The answer is D. Bonnie and Clyde
I recommend avoiding details and shading the piece until its fully sketched in
you can blend charcoal with a piece of tissue if you use your fingers it will leave prints
if you are in the process of shading place a piece of paper between your hand and the paper to avoid smuging
you can use a slice of bread to remove the graphite like a stretch eraser
Popular music can do either of those things, but popular music that stays well known and popular for years and years are those songs and albums that give the people something they have never seen before. Think of some of your favorite artists from the past: Queen, David Bowie, Elton John, etc. They all brought to the table what no one else was able to do and I think those leaps of faith speak for themselves. They are what keep the development of music going and pushing into the future instead of recycling the same old beats until you're beating a dead horse.