A jump rope held stationary by two children forms a shape modeled by the equation h=0.01x^2−x−26, where h is the height (in inches) above the ground and x is the distance (in inches) along the ground from one end. How close to the ground is the lowest part of the rope?
a. 0.5 in.
b. 1 in.
c. 1.25 in.
d. 2 in.