Answer:
C)The side that the charge is on, the top.
Explanation:
As we know that
1)More flux is possible, when the field is perpendicular to the cross sectional area.
2)Electrical field lines are more power full in this side because the charge is near to the top side.
3)Those sides are electric field parallel to area that sides have minimum flux.
So
The side that the charge is on, the top ,have least flux traverse.
Option C is correct.