What is the effect on the graph of f(x) = x2 when it is transformed to h(x) = 3x2 + 12. A. The graph of f(x) is horizontally stretched by a factor of 5 and shifted 12 units to the left. B. The graph of f(x) is vertically compressed by a factor of 5 and shifted 12 units up. C. The graph of f(x) is vertically compressed by a factor of 5 and shifted 12 units to the left. D. The graph of f(x) is horizontally compressed by a factor of 5 and shifted 12 units up.​