Math 12pts!

let f(x) = 3x^2 + 2 a new quadratic function g(x) is the function f(x) stretched vertically by a factor of 4. what is the equation of g(x)?

a. g(x) = 3x^2 + 6

b. g(x) = 12x^2 + 2

c. g(x) = 3x^2 + 8

d. g(x) = 12x^2 + 8