Which of the following about the controlling idea is not true？

A.The information in each paragraph must be related to that idea.

B.It is always the first sentence.

C.A paragraph is a sentence or group of sentences that support one main idea.That’s what we call the “controlling idea” because it controls what happens in the rest of the paragraph.

D.It is about the most important idea that you are trying to convey to your reader in a paragraph.

正确答案：It is always the first sentence.