Given the signal being made by the officer, when may you resume driving?

Given the signal being made by the officer, when may you resume driving?
A)When the officer lowers their arms.
B)Only when indicated by another signal.
C)Only when the officer changes position or makes another signal.Correct
The signal made by the officer requires users approaching the officer from any direction that intersects the direction indicated by the extended arm or arms to stop, regardless of their direction of travel, and remains in force even if the officer lowers the arm or arms, as long as the officer does not change position or make another signal.

Arm raised vertically: Requires all road users approaching the officer to stop, except drivers who cannot do so safely. The stop must be made at the nearest stop line or, failing that, immediately before the officer. At an intersection, the stop must be made before entering it. After this signal, the officer may indicate, where appropriate, the place where the stop must be made. (Photo 1)

Arm extended moving it alternately up and down: Requires drivers approaching the officer from the side corresponding to the arm making the signal, and perpendicularly to that arm, to reduce the speed of their vehicle. (Photo 2)