Sorry ______ failing to meet the deadline this week. I will do my best to complete the task soon.

• A. About
• B. With
• C. For
• D. By

Answer: (C)

Choosing the right preposition after “sorry” expresses what you’re apologizing for. When you’re apologizing for an action, you typically say “sorry for” plus a verb in the -ing form. In this sentence, the action is “failing to meet the deadline,” which is a gerund phrase, so the natural phrasing is “Sorry for failing to meet the deadline.”

“About” is sometimes used with apologies, but it’s less direct for a specific action here, and sounds less natural in this exact construction. “With” and “By” don’t fit the common pattern for apologizing for an action, so they don’t work in this sentence.