The probability of an accident being fatal is greater when travelling at an ... speed.
A)appropriate.
B)moderate.
C)inappropriate.Correct
When we travel at a speed that does not adapt to weather conditions or to the circumstances of the road, traffic, vehicle or the driver's condition, we are travelling at an inappropriate speed.
It may be that the speed at which we are travelling is within the permitted limits for the road, but that, faced with a problematic situation, we have great difficulty controlling the vehicle. For example, on rainy days more accidents tend to occur because many drivers travel at the same speed as on a sunny day — that is, they travel at a permitted but inappropriate speed for rainy days.
The probability of suffering a serious accident will always be higher when driving at an inappropriate speed than when driving at an appropriate or moderate speed.