6. You deposit $2000 in a savings account, and a year later you have $2100. Meanwhile, the consumer price index rises from 200 to 204. In this case, what are the nominal interest rate and the real interest rate, respectively?

a. 1 percent; 5 percent

b. 3 percent; 5 percent

c. 5 percent; 1 percent

d. 5 percent; 3 percent