Albert had 3c laptops for sale at a price of z dollars each. If the number of laptops not sold is less than x, and p is total dollar amount received on the sale of the laptops, which of the following is true?

A) p < 3c(z - x)
B) p < 3(c - x) * z
C) p > (3c - x) * z
D) p < (3c - x) * z​