The correct answer is:
B. the economy or the weather can make a small town fall apart .
Step-by-step explanation:
When a sentence has two or more subjects, that's called a “compound subject.” The individual subjects in a compound subject are connected by a coordinating conjunction (and, or, neither, nor). When the subjects are accompanied by “and,” the verb agrees with the pronoun “they.”A compound subject is like a subject in that it must be nouns. A compound subject is further than one noun performing as a subject.