For What Values of the Nonnegative Constant C Is the Minimum

Multiple Choice

For what values of the nonnegative constant c is the minimum distance from the point(0,c) to the parabola y = x2 equal to c?

A) 0 $\le$ c $\le$
B) 0 $\le$ c $\le$ 1
C) only c = 0
D) 0 $\le$ c < $\infty$
E) only c =