A current deposit account requires a minimum balance of $500 if annual interest of 5 per cent is to be earned monthly on its deposits. An account holder has maintained an average balance of $400 for the first nine months of the year and $800 for the last three months of the year. She has written an average of 10 cheques a month and is not charged for these services. However, it costs the bank $0.02 to process each cheque. What is the average return earned (both explicit and implicit) by the account holder over the full year? O A. 2.98 per cent O B. 3.48 per cent OC. 4.28 per cent OD. 4.79 per cent O E. None of the other listed options is correct