In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.
The tail is wagging the dog

Options

A. A situation where a small good thing makes everyone happy.
B. The less important or subsidiary factor, person, or thing dominates a situation.
C. A person who is always happy to meet you.
D. Even smaller tasks become important if the whole project is to succeed.

Answer

B