Consider the function f(x) = (x + 1)2 - 1. Which of the following functions stretches
f(x) vertically by a factor of 4?
OA) f(x) = 1/4(x + 1)² - 4
B) f(x) = (¹/4x + 1)² + 3
OC) f(x) = 4(4x + 1)² - 1
OD)
f(x) = 4(x + 1)² - 1