An officer is riding a motorcycle carrying a green flag — what does it indicate?

A)The road is open but extreme caution must be exercised.
B)A sporting event is taking place on the road.
C)The road is once again open to traffic from the point where the vehicle has passed.Correct
A green flag indicates that from the point where the vehicle carrying it has passed, the road is once again open to traffic.
A red flag indicates that from the point where the vehicle carrying it has passed, the road is temporarily closed to all vehicles and road users, except those accompanied or escorted by officers.
A yellow flag indicates the need to exercise extreme caution or the proximity of a hazard.