What is this officer indicating?

A)It indicates to other drivers and road users the need to exercise extreme caution.
B)It indicates that the road on which it is travelling is temporarily closed to traffic.
C)It indicates that from the point it passes, the road is once again open to traffic.Correct
A green flag indicates that from the point where the vehicle carrying it passes, the road is once again open to traffic.
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 those accompanied or escorted by officers.
If the flag is yellow, it indicates the need to exercise extreme caution or the proximity of a hazard.
When the officer, from their vehicle, extends their arm downward at an angle and holds it still, it indicates the obligation to stop on the right-hand side.