Select the correct answer. The function g(x) = x^2 is transformed to obtain function h:

h(x) = g(x) + 1.

Which statement describes how the graph of h is different from the graph of g?

A. The graph of his the graph of g vertically shifted up 1 unit.

B. The graph of his the graph of g vertically shifted down 1 unit.

C. The graph of his the graph of g horizontally shifted left 1 unit.

D. The graph of h is the graph of ghorizontally shifted right 1 unit.