Function g has a vertex at (2,4) and the parabola opens downwards.

Which of the following statements is true?

A.
The y-intercept of function f is greater than the y-intercept of function g.
B.
The minimum of function f is at (-5,6).
C.
The minimum of function g is at (2,4).
D.
The y-intercept of function f is less than the y-intercept of function g.