I can't write you the whole essay but i will say people were taught things differently and develop different personalities through the things they've experienced during the past and that builds up themselves as a person.
I think it's the first sentence because a noun phrase contains is or contains the subject and Hikers is the subject.
Its either B or D...... B if the whole story is about him trying for the team and D if that is a big part of the story. Hope I Helped!
Bobby is the lowest rated of the 4 options.
Bobby>Alicia>Hector
Bobby>Candace>Hector