I'd say the third sentence sounds very supportive, it supports the idea and positivity that service brings.
The statement provided above is actually false because ethnocentrism is the opposite of avoiding cultural bias. By definition, ethnocentrism is the belief that one's own culture or ethnicity is more superior than others. It is displayed when people make judgments about other people's manner of talking, behavior, religion, and traditions.
Answer: A because it is by C.S. Lewis
Explanation: