When a the subject of sentence has 2 or more nouns or pronouns connected by “or” or “nor,” the verb must agree with the noun or pronoun that appears closest to the verb in the sentence.

Would this be true or false?

True

This statement is true. When the subject of a sentence contains two or more nouns or pronouns connected by "or" or "nor," the verb must agree with the noun or pronoun that is closest to it. To determine the correct verb agreement in such cases, you need to identify the subject closest to the verb and make sure the verb agrees with it in terms of number (singular or plural).