the boys use the sticks and rocks to start the fire
I'll answer your question in the comments but what are the 2 sentences?
May I get the name of the book so I can help you out?
The pronoun needs to agree with the subject. So clearly "A. We" doesn't work in this sentence... The answer is "B." since the subject is about the author... So the sentence should look like this: "My little brother threw the ball toward Steve and I"