You are driving on a road and come across this officer — what does the red flag indicate?

You are driving on a road and come across this officer — what does the red flag indicate?
A)That you must stop on the right-hand side.
B)That you must be especially alert due to the proximity of a hazard.
C)That the road is temporarily closed to traffic from the point where that motorcycle passes.Correct
A red flag indicates that from the point where the vehicle carrying it passes, the road is temporarily closed to all vehicles and road users, except for those accompanied or escorted by officers.
If the flag is yellow, it indicates the need to be especially alert or the proximity of a hazard.
A green flag indicates that, from the point where the vehicle carrying it passes, the road is once again open to traffic.