A dictionary. You Look Up a definition of a Word in a dictionary and it’s meaning
B)expository text
Explanation:
It's non fiction and true information
An adjective clause is a type of clause that also contains a subject and a verb, but functions to describe a noun. This clause is often introduced by pronouns such as whom, who, that, which and the adverb where, when and why. In the given sentence above, the adjective clause is, "who received a good grade". This clause describes the noun "student".
