Melvin begins his retirement fund at age 30, depositing $1,000 per month until age 50. cindy begins her retirement fund at age 20, depositing the same $1,000 per month amount until age 50. both melvin and cindy earn 5% annual interest on their funds, and there are no tax considerations in this problem. based on the provided information:

Brian has been working for a few years now and has saved a substantial amount of money. he now wants to invest 50 percent of his savings in a bank account where it will be locked for three years and gain interest. which type of bank account should brian open? a. savings account b. money market account c. checking account d. certificate of deposit