[单选题]
A positive and a negative charge of equal (7 xg-qw* f(i3rkicnzmapfyyfv 33el 7xt)v 8r8gnitude are located on the same horizontal lin 7xv8ytf)p lry f8e33ve.
What is the direction of the net electric field at the point marked X, equidistant from the two charges?