Patty converted her principal residence to rental property two years ago when it was worth $70,000. Patty paid $85,000 for the house. What is Patty's basis in the house if after taking $10,000 of depreciation deductions she sells it for $66,000?
a. $60,000
b. $66,000
c. $70,000
d. $75,000
e. $85,000