models Annuity

Ab deposits $150 at the end of each month into an account that earns 5.1% per year compounded monthly. After 2 years, the account has $3781.56 in it. What would happen if the deposits were twice as great, $300? a) The amount in the account would be more than twice as great. b) The amount in the account would be twice as great C) The amount in the account would increase, but be less than twice as great. d) The amount in the account would be four times as great