Final answer:
In the event a deer stops in your lane while driving, quickly slow down and safely pull onto the shoulder if possible, and consider honking to urge the animal to move. The correct option is D.
Step-by-step explanation:
If you are driving an Electric Convenience Vehicle (ECV) during the daytime and a deer runs into the road and stops in your lane, the appropriate action to take to avoid a serious accident is to slow down quickly and pull onto the shoulder if it is safe to do so. Swerving into another lane, especially without checking for oncoming traffic or if it is safe to do so, could result in a collision.
Honking your horn may also help encourage the deer to move, but it's not a guaranteed method. Flashing your lights is less effective during the daytime and likely won't deter the animal. The most important thing is to maintain control of your vehicle and avoid sudden, unpredictable movements that could cause an accident.