David saves money from his teaching job to buy a new boat when he retires in 20 years. The boat will cost $30,000. He has $12,000 in his simple interest savings account. To reach his goal by retirement, david should. A keep his money where it is and be patient
B move his money to an IRA or Certificate of Deposit
C move his money to a compound interest account
D move his money to a business checking account