Three Equal Positive Charges Are Placed on the X-Axis,one at the Origin,one

Three equal positive charges are placed on the x-axis,one at the origin,one at x = 2 m,and the third at x = 6 m.Of the following points,which has the greatest magnitude electric field?
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A) x = 1 m
B) x = 4 m
C) x = 7 m
D) The electric field has the same magnitude at all three positions.
E) ​x = 0 m