Final answer:
The sentence about Erica, the arts student, is correct as written and does not require any changes. 'Studies' correctly matches the singular subject 'Erica' and 'is' appropriately indicates her current status as a student.
Step-by-step explanation:
The sentence in question is: "Erica is a student of the arts; she studies literature, music, and painting at her university." The correct answer to the proposed question is B. It is correct as is. No change needs to be made to the verb 'studies' as it is properly conjugated to match the singular subject 'Erica.' Additionally, the verb 'is' accurately reflects the current state of Erica being a student. The sentence is grammatically correct and clear in its current form.