An exterminator estimated there were 12,000 termites in a house. Each time the house was sprayed, the number of termites was reduced to one-fourth the previous number. How many termites were there after the house was sprayed x times? Write a function to represent this scenario.

A. f(x) = 12,000 + (1/4)ˣ
B. f(x) = 12,000 - (1/4)ˣ
C. f(x) = 12,000 (1/4)ˣ
D. f(x) = (12, 000)ˣ