A collective noun is a kind of noun that denotes a collection of things or a group of individuals. The sentence that contains a collective noun is: The legislature met in secret session. The correct answer is option d. The collective noun in this sentence is the word "legislature". Legislature refers to the group who make laws.
The second choice is a fragment, not a complete sentence.
I believe the correct choice is number one, because if you turn the sentence around, it answers the question of why the crowd is gathered. You may want to confirm on the website chompchomp.com (Grammar Bites).
Answer:
Christopher and his coworker decided that instead of working every other car, they would work every 30 minutes. This allowed Christopher time to do other things — besides reading novels (one of his great passions), he began writing to overcome the boredom.
Explanation:
