Which of the following is true?

A) Compound interest means that you are earning interest on the principal but not prior interest earned.
B) All of the above are true.
C) The law of compound interest highlights the importance of beginning to save at a young age.
D) Assume a 7 percent rate of interest and a price of $6 per pack of cigarettes. Smoking one pack of cigarettes per day for 50 years will cost the smoker $109,500 (=$6 365 days50 years).

C) The law of compound interest highlights the importance of beginning to save at a young age.