The cost, in dollars, of printing n digital photos is f(n) = 1.20 + 0.50n. Which statement is correct?

A)For each additional photo printed, the cost increases by $1.30.

B)For each additional photo printed, the cost increases by $1.20.

C)For each additional photo printed, the cost increases by $0.50.

D)For each additional photo printed, the cost increases by $1.70.