Which of the following statements is true?
A. A qualified residence cannot be a recreational vehicle.
B. A taxpayer may only treat a home under construction as a qualified residence for two years, and then only if the taxpayer uses it as his or her residence once it is ready for occupancy.
C. A taxpayer borrows the amount for the down payment for the purchase of his home on his unsecured credit card (credit card cash advance). The taxpayer will be able to deduct the interest on this credit card as qualified mortgage interest because the proceeds are traceable to the purchase of his home.
D. The amount a taxpayer can deduct for home mortgage interest is unlimited.