Answer:
Best Revision of the Sentence is:
3. Wharton or Harvard is my preference; however, I’ll attend any school that accepts me.
Explanation:
The subjective "Wharton or Harvard" being singular must agree with the singular form of the verb "is," and not the plural form of the verb "are." Â In the same way, the singular form of the subject "school" must agree with the singular form of the verb "accepts" and not the plural form "accept." Â This is grammatically described as "concord," which is the agreement of subject and verb.