Select the answer. What are the zeros of this quadratic function?

f(x) = (x - 7)(x + 8)

A.) x = 0 and x = 7
B.) x = -7 and x = 8
C.) x = 0 and x = -8
D.) x = 7 and x = -8

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest