Consider the exponential function graphed on the coordinate plane. For which values of x does the exponential graph shown have positive y-value solutions?

A. The graph has positive y-value solutions only for X-values that are greater than zero.

B. The graph has positive y-value solutions only for x-values that are less than zero.

C. The graph has positive y-value solutions only for integer x-values.

D. The graph has positive y-value solutions for all real x-values.