From experience with my best friend, I´d say C.
Answer:
His body is more healthy and fit.
Explanation:
Brendan's high fitness scores shows that his body is more healthy and fit as compared to other people because high score can only be obtained if the body is healthy and full of fitness. Brendan eats healthy diet and proper exercise made him very healthy and fit. There is also a lower risk of diseases to him due to strong immune system so that's why we can say that Brendan's high fitness scores indicates his healthier and fit body.
So start off the first paragraph explaining three things you are thankful for Ex. I am so thankful for sm. One of them being____ so on and so on. Then the next three paragraphs explain moreee about those three things. Have the last paragraph be the closing paragraph saying “I love my life” yatty yatty yatty