Select the correct answer. The function g(x) = x2 is transformed to obtain function h:
h(x) = g(x + 7).
Which statement describes how the graph of h is different from the graph of g?
A. The graph of h is the graph of g horizontally shifted left 7 units.
B. The graph of h is the graph of g vertically shifted up 7 units.
C. The graph of h is the graph of g horizontally shifted right 7 units.
D. The graph of h is the graph of g vertically shifted down 7 units.