Karen Has Been Depositing $150 at the End of Each

Multiple Choice

Karen has been depositing $150 at the end of each month in a tax-free retirement account since she was 30. Matt, who is the same age as Karen, started depositing $300 at the end of each month in a tax-free retirement account when he was 40. Assuming that both accounts have been and will be earning interest at the rate of 7%/year compounded monthly, who will end up with the larger retirement account at the age of 65, Karen or Matt? ​

A) Matt will end up with the larger retirement account.
B) Karen will end up with the larger retirement account.
C) Karen and Matt will end up with the equal retirement accounts.