Gilbert is graduating from college in twelve months, but he will need a loan in the amount of $5,125 for his last two semesters. He may either receive an unsubsidized Stafford Loan with an interest rate of 6.8%, compounded monthly, or his parents may get a PLUS Loan with an interest rate of 7.8%, compounded monthly. The Stafford Loan has a grace period of six months from the time of graduation. Which loan will have a higher balance at the time of repayment and by how much?

a. The Stafford Loan has a higher balance by $134.35.

b. The Stafford Loan has a higher balance by $274.36.

c. The PLUS Loan has a higher balance by $54.79.

d. The PLUS Loan has a higher balance by $85.22.