The correct answer is: C. 25 meters
The driver must stop short of the gate of 25 meters. This is to ensure that the gate has enough time to close before the driver reaches it. If the driver stops too close to the gate, there is a risk that the gate will close on the driver’s vehicle, which could cause an accident.
Option A is incorrect because it is too far away. The driver must stop short of the gate so that the gate has enough time to close. If the driver stops too far away, there is a risk that the gate will not close in time, which could allow a pedestrian or cyclist to cross the road in front of the driver’s vehicle.
Option B is incorrect because it is too close. The driver must stop short of the gate so that there is enough space for the gate to close. If the driver stops too close, there is a risk that the gate will close on the driver’s vehicle, which could cause an accident.
Option D is incorrect because it is not a valid option. The driver must stop short of the gate of 25 meters.