140. Marco makes the mortgage payments on several properties. He paid mortgage interest of $6,048 on his personal home, $5,261 on his vacation home (used only for personal purposes), $4,995 on his mothers home (the mother is legally liable for the debt), and $7,642 on his rental property. How much mortgage interest can Marco deduct as an itemized deduction on Schedule A?

Select one:

a. $23,946

b. $11,309

c. $12,637

d. $6,048