The maximum Bending Moment due to an isolated load in a three-hinged parabolic arch (span l, rise h) having one of its hinges at the crown, occurs on either side of the crown at a distance

A

$$\frac{I}{4}$$

B

$$\frac{h}{4}$$

C

$$\frac{I}{(2\sqrt{3})}$$

D

$$\frac{I}{(3\sqrt{2})}$$