Suppose f(x) = x2 and g(x) = (2x)2. Which statement best compares the graph of g(x) with the graph of f(x)?
A.The graph of g(x) is vertically stretched by a factor of 2.
B. The graph of g(x) is shifted 2 units to the right.
C. The graph of g(x) is horizontally stretched by a factor of 2.
D. The graph of g(x) is horizontally compressed by a factor of 2.