B is correct, "<span> Christina and I went to the same summer camp for years (since we were 8)" </span>parentheses are used when you have some extra information you want to add, but its not completely necessary. Like how they started going to the same summer camp when they were 8, you can still read the sentence fine without it, but it's a nice piece of information.
Incomplete question, What is the answer to Part A ?
Between by Jessica Warman
Elisabeth Valcher, a spoilt, vain but wealthy teen, wakes up on her father's yacht after a party celebrating her 18th birthday to find herself dead, face down in the water. As she goes to explore, she discovers information that changes what she felt she learned about her life, her relationships, and everything in between. Liz must discover that no one around her, least of all Liz herself, was flawless innocent-as she starts to uncover the events around her birthday night.
