Find the vertex, focus, and directrix of the parabola.x2 = 16y
A. vertex: (0, 0)
focus: (0, 4)
directrix: y = -4
B. vertex: (0, 0)
focus: (-4, 0)
directrix: x = 4
C. vertex: (0, 0)
focus: (0, -4)
directrix: y = 4
D. vertex: (0, 0)
focus: (4, 0)
directrix: x = -4
Answer: A
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