The cost of a pound of strawberries at a local market increases at a rate of 2.1% per year due to greater agricultural costs. The following exponential expression gives the cost of a pound of strawberries after t years. 3.50(1.021)^t

Which of the following expressions reveals the monthly rate of increase for the cost of a pound of strawberries?

A) (1.002)^12t

B) (0.998)^t/12

C) (1.002)^t/12

D) (0.998)^12t