Final answer:
No, the statement is false. The compound antecedent 'Mandi and Isabel' could be referenced by the singular pronoun 'they'.
Step-by-step explanation:
No, the statement is false. Mandi and Isabel could be a compound antecedent referenced by the singular pronoun 'they'. Compound antecedents refer to two or more nouns or pronouns that are joined by a coordinating conjunction, such as 'and'. In this case, 'Mandi and Isabel' would be the compound antecedent, and the pronoun 'they' would be used to refer to them. For example, 'Mandi and Isabel went to the store, and they bought some groceries.' In this sentence, the compound antecedent 'Mandi and Isabel' is referenced by the pronoun 'they'.
Learn more about compound antecedents