Final answer:
Option a is correct; one should not pull away from the curb until it is safe to do so, and excessive use of the horn is not advisable. Traffic safety rules, including speed limits and signals, are crucial to follow for the safety of all road users.
Step-by-step explanation:
The correct answer is option a. When pulling out from a curb, one must not start until they can move with reasonable safety. This means that before pulling into traffic, a driver must ensure that the road conditions, traffic, and visibility allow for a safe entry into the flow of traffic. It is critical to use the vehicle's mirrors and turn to look over the shoulder to check for any blind spots.
A driver should also use the appropriate traffic signals to indicate their intent to merge or pull away from the curb. Although not explicitly stated in the options, it goes without saying that honking the horn excessively without a clear reason could be considered as noise pollution or disorderly conduct, and running alongside any moving vehicle, such as an ambulance, is hazardous and inappropriate. Traffic signs and signals, pedestrian safety at intersections, and maintaining the speed limit are significant in ensuring everyone's safety on the road. Hence, following traffic rules and signals is essential for the safety of all road users.