She is a fair-weather friend.

Options

A. a good friend
B. a friend who meets difficulties calmly
C. a friend who deserts you in difficulties
D. a favourable friend

Answer

C

Explanation

a fair-weather friend : some body who stops being a friend when you are in trouble .
I had a lot of money and I knew a lot of people, but most of them turned out to be fair-weather friends. The best option is a friend who deserts you in difficulties.