Which of the following methods of marking a load overhanging for more than 0.5 m from the rear outline of the truck is correct?

According to the regulations of the Road Traffic Act, a load projecting from the rear of a heavy goods vehicle by more than 0.5 m must be marked with a board with alternating white and red stripes, which is correctly shown in figure C. Figure A (a red flag) is a marking used in special cases, e.g., when transporting timber, whereas figure B (a warning triangle) is used for signalling a stationary, damaged vehicle.