On January 1, 2021, P bought her first home (her principal residence) for $700,000 by paying $300,000 down. She borrowed the remaining $400,000 by taking out a 15-year mortgage loan at her bank. This main loan had a 3% Interest rate. During 2021, P paid interest of $12,000 and no principal payments on this main loan. On July 1, 2021, when the home was worth $750,000, P took out a home-equity loan of $50,000 with an interest rate of 4 percent, using the $50,000 to buy a personal car and to pay off credit card debt. During 2021, she made interest payments on the $50,000 home-equity loan in the amount of $1,000 (and no principal payments on the home-equity loan). Both loans were recorded with the home as security. What amount of the $13,000 interest expense paid can P deduct a 2021 itemized deduction? as a. $12,000 b. $1,000 c. $0 d. $13,000