You must not enter an intersection, even if the traffic light is green, if...

A)vehicles are approaching from the right.
B)there is a stop sign or a give way sign.
C)an officer orders you to stop.Correct
The signals and orders of officers are always immediately enforceable and must therefore be obeyed immediately by drivers and other road users. They take precedence over any other signal and over traffic regulations, even if they are in contradiction with those regulations and signals.