Sentences that do not relate to a paragraph's topic should be

A) typed in smaller font.
B) put in quotation marks.
C) surrounded by parentheses.
D) moved to another part of the document or deleted.

Topic

A subject or matter dealt with in a text, discourse, or conversation.

Font

A set of printable or displayable text characters in a specific style and size, used in computing and typesetting.

Parentheses

Curved lines used in writing to enclose explanatory material or indicate an aside from the main text.