Positive Charge Q Is Uniformly Distributed on a Semicircular Rod $\uparrow$

Multiple Choice

Positive charge Q is uniformly distributed on a semicircular rod.What is the direction of the electric field at point P, the center of the semicircle?

A) " $\uparrow$ "
B) " $\downarrow$ "
C) " $\leftarrow$ "
D) " $\rightarrow$ "
E) ""