What should you do before making a U-turn?

Answer: B — Check your blind spots

Before making a U-turn, it is important to check your blind spots in order to ensure that there are no other vehicles or pedestrians in the area. A Checking your speed may also be important, but it is not the most crucial step before making a U-turn. C: While changing lanes may be necessary when making a legal U-turn, it is not the first step you should take. D: Looking for signage can also be helpful, but it is not as important as checking your blind spots. Ultimately, checking your blind spots is the most important action to take before making a U-turn to ensure the safety of yourself and others on the road.