What should you do before changing lanes or turning?

Answer: B — Turn on the appropriate turning signal at least 100 feet or 5 seconds before

Turning on the appropriate turning signal at least 100 feet or 5 seconds before changing lanes or turning is the correct action to take. This practice is essential for safe driving because it communicates your intentions to other drivers and pedestrians, allowing them to anticipate your movements. Signaling well in advance helps reduce the likelihood of accidents by ensuring that everyone on the road is aware of your planned actions, thereby fostering a safer driving environment. Consideration of the distance (100 feet or 5 seconds) provides a guideline to ensure that your signal is visible and effective for others to react accordingly. Using your turn signal is not just a legal requirement in many jurisdictions; it is also a basic courtesy that contributes to safe driving practices.