Is There a Difference Between the Terms Interest and Interest

Is there a difference between the terms interest and interest rate?

A) No.Interest is simply a shorthand version of interest rate.
B) Yes.Interest refers to the return that capital earns, whereas interest rate is the payment to someone who lends money to someone else.
C) Yes.Interest is what one earns by placing funds in a savings account, whereas interest rate is the rate that the U.S.Treasury pays for borrowed funds when the government incurs a deficit.
D) Yes.Interest is a dollar payment for the use of funds, whereas interest rate is the ratio of that dollar amount to the total amount of funds borrowed.