Final answer:
The purchasing power of your money decreased by 5 percent due to inflation.
Step-by-step explanation:
The inflation rate of 2 percent reduced the purchasing power of your money by 2 percent. Therefore, the answer is option D) decreased by 5 percent. Here's how:
When your friend repays the loan after one year, the money you receive will have lost value due to inflation. The nominal interest rate of 3 percent will not be enough to compensate for the loss in purchasing power caused by inflation. As a result, the real rate of return will be negative, indicating a decrease in the purchasing power of your money.