To keep control over the motorcycle, motorcyclists should...

Answer: C — Avoid applying the brakes when making a turn.

To maintain control over the motorcycle during turns, it is advised to avoid applying the brakes. When a motorcycle is leaned into a turn, braking can upset the balance and stability necessary to navigate the curve safely. Instead, slowing down before entering the turn and maintaining throttle control helps ensure a smoother and safer turn by stabilizing the bike. The other choices could lead to misunderstandings about safe riding practices. For instance, changing lanes on the freeway is permissible when done safely and with proper signaling. Downshifting while stopping can be a part of effective riding technique when done correctly, as it allows for more control over the bike. Lastly, using headlights during daylight hours enhances visibility and safety on the road, as it makes the motorcycle more noticeable to other drivers. Therefore, the choice to avoid braking while turning is crucial for maintaining control and ensuring safe maneuvering on a motorcycle.