Correct option is D
Idiom Meaning:
A piece of cake - something that is very easy to do.
Explanation:
• The phrase implies ease or lack of difficulty. Sentence (d) best reflects this meaning.
Correct: They found a table without any difficulty → It was a piece of cake.
Option Analysis:
(a) Implies performance but doesn’t highlight ease.
(b) Involves success but not necessarily ease.
(c) Opposite of idiom – indicates difficulty.
(d) Describes a situation handled easily.