A claim is the main argument. Evidence is the facts or research to support your claim. I hope you win your next argument! :D
Answer:
Owned up
Explanation:
As a result of the topic being idioms/phrases, the best word that completes the sentence is the idiom "owned up".
Another word that would have sufficed would be "admitted" but unfortunately, it isn't an idiom, so the idiom "owned up" is the correct answer.
The idiom "own up" means admitting to something.
"When his father was ready with cane,he OWNED UP to having stolen the ring."
The answer would be "<span>Aiden is thrilled about starting a performance project on Romeo and Juliet, although he worries about getting assigned to a group of students who are poor actors." YOU'RE WELCOME :D
Sorry I took too long to answer :P</span>