A counterclaim is a claim to rebut a previous claim or to object the claim that was made.
The answer is Daisy Buchanan
A good question to ask her is:
When did she start writing?
What gave her the idea to write her book?
What is her favorite place to write?
How does she sit still long enough to write (That's something I can't do for more than a few minutes, so I'd like to know!)
A concrete statement can be considered as a 'solid' statement. This means that the sentence must contain hard facts to manifest the credibility of the statement. As much as possible, you give specific examples and provide evidence for this. From the choices, the answer would be D.