Final answer:
Harris will owe $0 in taxes from the scholarship because the full amount can be applied to qualified educational expenses, making it tax-free.
Step-by-step explanation:
The student's question asks how much tax will be owed from the scholarship. Since Harris received scholarships totaling $15,000 and has qualified educational expenses of $20,000, the entire amount of the scholarship can be applied towards these expenses, making it tax-free. Therefore, none of the scholarship money would be subject to income tax. His part-time earnings as a tutor are separate and should be taxed according to the marginal tax rate but are not part of the scholarship amount. Considering these details, the correct answer is B) $0.