Words: who, whom , which, that, what, whose are __ Select one: A a. indefinite pronouns b. personal pronouns c. demonstrative pronouns d. relative pronouns

The words "who," "whom," "which," "that," "what," and "whose" are used to introduce relative clauses in sentences. They connect the clause to a noun or pronoun that was mentioned earlier in the sentence, providing more information about it. Therefore, they are classified as relative pronouns.