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 right 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 vertically shifted down 7 units.

D. The graph of h is the graph of g horizontally shifted left 7 units.