The function h(x) = -\frac{1}{2}(x - 4)^2 + 3 represents the height of a bird y over time x, as it flies...

The function h(x) = -\frac{1}{2}(x - 4)^2 + 3 represents the height of a bird y over time x, as it flies past the school. What point on the graph represents the greatest height of the bird above the ground?
A. (4, 3)
B. (3, 4)
C. \left(\frac{1}{2}, 4\right)
D. \left(3, \frac{1}{2}\right)