Margot purchased a house for a rental property for $200,000 three years ago. During the time she owned this rental, her net rental income was a total of $15,000. She just sold the property for $160,000. What was her average annual return on this investment?
Select one:
a. -4.17%
b. -29.2%
c. -20.00%
d. -6.67%
e. -3.13%
f. -12.50%