Question

Which sentence does not contain any errors in punctuation or capitalization?

Answer 1

D. Is the right answer with no mistakes

Answer 2

Well,

Let's start with these rules:
1. There should be a comma before a(n) direct/indirect quotation.
2. The ending punctuation should be before the close quotation.
3. The quotation should begin with a capital letter.

Option A does not have a comma, and does not capitalize the first letter, so it is eliminated.

Option C does not have a comma either.

Option B's exclamation mark is outside of the quotation marks, which excludes that.

The only option left is D, which is the correct answer.