The answer is B you want the supporting details to help support your main idea not introduce it
If you really like him, than date him.If you can find someone else you like better than don't date with him.
I think C would be the best answer.
Answer:
you didnt add the excerpt but the definition of idiom is
a group of words established by usage as having a meaning not deducible from those of the individual words
or
a characteristic mode of expression in music or art.
Explanation: