Compared to the parent function f(x)=x², the function g(x) has been horizontally shrunk by a factor of 1/3 and then vertically stretched by a factor of 4 .
Which is g(x)?
(A) g(x)=3(1/4x)²
(B) g(x)=3(4x)²
(C) g(x)=4(1/3x)²
(D) g(x)=4(3x)²