What must you do before you turn to the right on a straight road?

Answer: A — Signal for at least three seconds

Before making a right turn on a straight road, signaling your intention to turn is crucial for safety and communication with other road users. Signaling for at least three seconds provides adequate notice to drivers and riders behind you, as well as those ahead who may be affected by your maneuver. This action alerts others to your intention, reducing the risk of misunderstandings and potential accidents. When turning right, it's also essential to be aware of other vehicles on the road, particularly those coming straight towards you, as they may have the right of way. Moving towards the center line is a common maneuver to position your vehicle for the turn, while checking mirrors is important for overall situational awareness. However, signaling remains the primary action to ensure that you clearly communicate your next move to others on the road.