Why He Didn't Attend the Meeting: Grammar Explanation

The correct answer is 'C. that'.

The sentence structure here requires a relative pronoun to connect the reason for his absence to the main clause. 'That' is the appropriate choice because it introduces a defining relative clause that is essential for understanding the reason.

Here's why the other options are incorrect:

• 'Which': While 'which' can be used for non-defining relative clauses (which add extra information), it doesn't fit the context here.* 'With which': This combination is not grammatically correct in this sentence.* 'For which': This phrase suggests a reason for something else, not the reason for his absence itself.

The corrected sentence: This is the reason that he didn't come to the meeting.