очень нужна по английскому

A. the idiom is - It's a piece of cake.

B. the idiom is - It sells like hot cakes.

C. the idiom is - You can't have your cake and eat it.

D. the idiom is - Icing on the cake.

1) Her new book is selling like hot cakes.

2) And the ring is just the icing on the cake.

3) That job was a a piece of cake. It was the easiest thing that I ever did.

4) You want to spend your money and still have it. You can't have your cake and eat it too!