Which of the following are acceptable methods for collision avoidance?

The most effective methods for collision avoidance rely on adapting quickly to the situation while maintaining control of the vehicle. The choice involving quick, sudden braking paired with evasive steering or sudden lane changes is considered acceptable because it allows the driver to rapidly respond to unexpected obstacles or hazards.

In a critical situation where a collision is imminent, the ability to brake suddenly can reduce the speed at impact or avoid the obstacle altogether if combined with evasive maneuvers. Evasive steering can help navigate around an obstacle, while sudden lane changes are effective to evade hazards directly in the vehicle's path. However, it's essential that these maneuvers are executed with vehicle control and situational awareness to avoid losing control or creating additional hazards.

Other choices may lack the balance of speed and control needed in emergency situations. For example, gradual actions or non-reactive strategies may not be swift enough to prevent a collision. Thus, option B stands out as the most viable method for ensuring collision avoidance in urgent circumstances.