Answer: D
Step-by-step explanation:
It can't be A because that transition doesn't make sense.
It could be B because it makes more sense. For example, if you have a lot of homework and still had to learn a piece of music, you could say that.
It can't be C because--do I have to explain?
I have so much homework, so I still have to learn this piece of music.
Doesn't make sense.
It could be D because this expresses a sense on annoyance as to having a lot of homework and still having to learn a piece of music.
I have so much homework, yet I still have to learn this piece of music.
I'm debating on B and D, but I think its D.
Correct me if I'm wrong!