Final answer:
When entering a narrow bridge after a curve, one must know their vehicle's off track behavior and adjust the speed to maintain control; hence, options a) and b) are correct.
Step-by-step explanation:
When entering a narrow bridge from a curve, you should be familiar with the amount of off track your vehicle displays and adjust your speed appropriately. Answers a) and b) are both correct. Being familiar with your vehicle's off track helps in navigating through the curve safely without veering off the path, and adjusting your speed is essential for maintaining control of the vehicle on the narrow bridge. Using flashers is not a method for ensuring other drivers get out of your way; rather, it is for signaling that you are in distress or your vehicle is moving significantly slower than normal traffic.