What is the most suitable option for Norm to invest his $15,000, considering his daughter's upcoming college plans and the associated interest rates? a. A four-year CD paying 4.8% interest, with a substantial penalty for early withdrawal b. An online savings account offering 2.3% interest c. A money market account paying 3.5% interest, renewable for three-month commitments d. A checking account with no monthly fees Please select the best answer from the choices provided