Suppose ice cream cones costs $3. Molly holds $60. What is the real value of the money she holds?

a. $60. If the price of ice cream cones rises, to maintain the real value of her money holdings she need to hold fewer dollars.
b. $60. If the price of ice cream cones rises, to maintain the real value of her money holdings she need to hold more dollars.
c. 20 ice cream cones. If the price of ice cream cones rises, to maintain the real value of her money holdings she needs to hold more dollars.
d. 20 ice cream cones. If the price of ice cream cones rises, to maintain the real value of her money holdings she needs to hold fewer dollars.