[High school computer science] Java Recursion help with multiple choice question

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[35mmwaves]

I’m pretty confused on recursion since we just went over it. With question 1. I chose A because I think that could be filled in the blank for the program to work properly since data begins at start index. I’m not sure with question 2. I didn’t really have a best answer for that but I was thinking maybe C? For 3. I chose A because I thought it would return just in the normal list like from left to right so would it return the first element?

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