The correct answer is C.
The statement "Every person should make it a priority to serve at least two hours per week." is not objective and is not a crucial detail.
The point of the article is that community service is beneficial. However, it is not a fact that serving at least two hours a week is necessary. More or less time devoted to service might be better -- but the author is offering no objective proof to this weekly two-hour requirement.
Therefore, this sentence is the least important sentence in the entire paragraph. It can be deleted without losing any meaning regarding the importance of community service.
In 2012, Puerto Rico celebrates the 40th anniversary of Clemente's 3,000th with a ceremony in Pittsburgh's PNC Park, but the most noteworthy commemoration of his passing is a musical about his life that played in a Santurce, P.R., theater .
Answer:
What makes you a good friend is how you treat the person and how you act towards them