Final answer:
It is illegal to drive as fast as the posted speed limit, if conditions make that speed unsafe.
Step-by-step explanation:
The statement "It is illegal to drive as fast as the posted speed limit, if conditions make that speed unsafe" is true.
While the speed limit is set to provide a guideline for safe driving, it is important to adjust your speed based on the specific conditions on the road. If the conditions, such as heavy rain, presence of ice, or low visibility, make it unsafe to drive at the posted speed limit, you should slow down to a speed that is safe for the current conditions.
For example, if the posted speed limit is 45 mph but it is raining heavily, driving at 45 mph may be unsafe due to reduced traction and visibility. In this case, it is necessary to decrease your speed to maintain control of the vehicle and ensure the safety of yourself and others.