Revision involves clarifying purpose and meaning.
All other choices would be incorrect because they are a part of the process of editing.
Answer:
A
Explanation:
It's not a complete sentence. It leaves you hanging. It's only a <em>fragment</em> of the sentence. We don't know what Marshall did when he realized that Barney lied to him about the stain on the carpet.
Even though synonyms generally share the same meaning, they might not apply in the same context. So, if you want to use one specific word you should do that instead of trying to find a synonym that doesn't quite fit into the context you've established. An example is if you want to use the sentence "I was mad", meaning "I was angry", you could look for a synonym. One synonym is "absurd". However, this is a different type of mad, meaning crazy instead of meaning angry. "I was absurd" has an entirely different meaning than originally intended. This is why you should always double check the contextual meaning of the synonym you want to use.
The best way to compare and contrast is D compare their differences and similarities.