What does this sign indicate?

What does this sign indicate?
A)The start of a new lane to the left on a two-lane carriageway.
B)Obligation to continue straight ahead because the left lane ends.
C)A fork to the left on a three-lane carriageway.Correct
This sign indicates, on a carriageway with three lanes travelling in the same direction, that in the next section the left-hand lane will fork off to that same side.