Answer:
it should be the first one :)
I would say C is the main idea. A and B are too specific and D is inaccurate.
Answer: He is a breath of fresh air
Explanation:
She is as sweet as a peach.
It feels like day will never end.
These are not because they use the words like and as for the description. These are similes.
Never cry over spilled milk is an idiom.