Question

A weak or indefinite reference occurs when a pronoun __________. functions as the object of a preposition modifies an adjective, adverb, or verb refers to an unknown antecedent may refer to two or more antecedents

Answer 1

may refer to two or more antecedents

Answer 2

the answer to the question stated above is an unknown antecedent.
Weak reference: when a pronoun refers to an antecedent that has been suggested but not expressed Indefinite reference: the use of a pronoun that refers to no particular person or thing and which is not necessary to the meaning and structure of a sentence