Interest Rates and ATM Trips. Carlos, who lives in a country where interest rates are very high, goes to an ATM every day to get $10 of spending money. Art, who lives in a country with relatively low interest rates, goes to the ATM once a month to get $30C spending money. Why does Carlos use the ATM more frequently? (Assume they both have interest bearing checking accounts.) OA. Art's opportunity cost of holding cash is higher. B. Carlos' opportunity cost of holding cash is higher. C. Carlos doesn't like to carry a lot of cash. D. High interest rates imply low banking fees.