Answer: A
Personally I would say the answer is A, but the definition of slender is literally "gracefully thin," so you could argue it's both A and B. Maybe it's something to take up with your teacher.
Answer:
it sounds fine to me, but I think it would be better as"I should've never changed the color of my braces to orange." But either work I'm pretty sure
That lady macbeth gets up every night takes out a piece of paper writes on it, then proceeds to fold it and return back to bed