Explanation: the answer is he
Other than a question mark? I'd have to see the sentence to understand or is this the sentence?
The words remorse and regret are synonymous to each other. Meaning with deep regret and guilt. Therefore the correct answer to this question is letter "B. Synonyms". Homophones are words that sound similar to each other, and Antonyms are words that have opposite meanings with each other.
I say C because all the other ones sounds right