According to Balance Theory,which of the Following Best Explains Why

According to balance theory,which of the following best explains why one only has to be liked,not an expert,in order to be convincing?

A) Experts are usually not convincing because they talk in an incomprehensible language.
B) Experts are usually not convincing because they are not seen as trustworthy.
C) People tend to agree with those whom they like in order to preserve cognitive consistency.
D) People tend to undermine the expertise of those whom they like.