I need correct answer for my question

Hello Sir

How are you? I would like to request you that i have three question answer problem. Which is correct answer?

here is the answer-

Question-1:
Choose the series of pronouns that best completes the following sentence.
______ is the name of the opera, and ______ role did you say Maria would play?
a. This, which
b. Who, that
c. What, which
d. Which, what

Question-2:
Choose the series of adjectives and adverbs that best completes the following sentence.
Of the two books, Sam's is definitely the _________ ; however, even though Sandra's didn't turn out as _________ as expected,
she still did a ________ job of writing it.
a. better, well, good
b. best, good, good
c. better, good, better
d. best, well, well

Question:
Which of the following sentences is punctuated correctly?
a. Tracy bought three suits; seven scarves; and ten pairs of shoes.
b. We are expecting a hurricane this afternoon, therefore we have closed the school early.
c. Allen, the receptionist at my office, is a handsome guy.
d. I have never been so insulted: I think I will go home now.

I hope that everybody will help me that what is correct answer for this three question

thanking you
sohel