Which statement about allusion is true? a)Authors seldom use allusion when writing books.
B)Authors use allusion for only one reason: to portray their own values.
C)Allusion is an indirect reference to someone or something from literature or history.
D)Allusion is primarily used to force readers to use the encyclopedia.

C)Allusion is an indirect reference to someone or something from literature or history.

Explanation:

Allusion is a direct or indirect reference to a person, event, or thing or to a part of another text from literature or history. Allusions are used by writers based on the assumption that the reader would understand what the writer is talking about.

An example of an Allusion is "France is as beautiful as the garden of Eden". The garden of Eden is a biblical allusion found in the bible in the book of Genesis.