Upon seeing the sign, what happens to the traffic flow?

A)You must compulsorily continue along the two right-hand lanes.
B)All lanes continue in the same direction.
C)Two lanes will turn left and two lanes will turn right.Correct
Sign S-63a indicates a fork on a four-lane carriageway in the same direction.
Two lanes will diverge to the left and two lanes will diverge to the right.
The purpose of this sign is to inform drivers in advance so they can position themselves in the correct lane according to the direction they intend to take.
Two lanes will diverge to the left and two lanes will diverge to the right.
The purpose of this sign is to inform drivers in advance so they can position themselves in the correct lane according to the direction they intend to take.