I would say C) is the correct answer.
With quotations remember:
- A quote must include capitalization at the beginning of a sentence.
For example, Mi Ling asked "(I)f she could be excused."
- Only the quote should have quotation marks around them.
For example, "Why don't we go to the restaurant for dinner?" said Tom. (Said Tom would not be in quotation marks!)
- When giving information before a quote, you must add a comma.
For example, Mi Ling asked(,) "If she could be excused."