If h is a function and -7 is an element in its domain, then which of the following statements correctly describes the expression h(-7)? A. The value of h should be multiplied by -7 to evaluate the expression.
B. The expression h(-7) represents the input of h corresponding to the output of -7.
C. The expression h(-7) represents that -7 is the only element in the domain of h.
D. The expression h(-7) represents the output of h corresponding to the input of -7.