Sandra is legally responsible for her qualified student loans, but her grandparents make the monthly payments. Sandra is not claimable as anyone's dependent. Who is eligible to claim the deduction for the interest paid on Sandra's student loans?
A) Sandra.
B) Sandra's grandparents.
C) Sandra and her grandparents each deduct one-half of the student loan interest.
D) Sandra and her grandparents choose which one of them claims the entire deduction.