When Lady Macbeth dies, he feels nothing, he is emotionless. That might tell us that she has turned him into a ruthless killer, who will stop at nothing to get what he wants, and what he wants is the kingdom. He is very calm, as if he doesn't care at all that his wife died - she has turned him into a mad monster. He has lost all ability to feel, at least until he finishes what he has started.
I believe it would be B, because there are two subjects that the speaker is referring to at the beginning of the sentence; the caterpillar and the leaf. When they use the word "it" in the second half of the sentence it is unclear whether they mean to say if "it" is the leaf or the caterpillar which they are carrying to their brother.
Turn sadly to a adjective first: sad
Add most or -est
So it can be most sad or saddest
Option 4, 'a quote from a customer describing how much their electric bill was lowered,' best supports evidence that solar panels save money. You are using a first hand source to prove to the audience that solar panels save money.
