The cones on the roadway indicate...

The cones on the roadway indicate...
A)reinforcement of the broken lane markings.
B)nothing, because they are not traffic signs.
C)the prohibition of crossing the imaginary line connecting them.Correct
Small flags, cones or similar devices prohibit passage across the line, real or imaginary, that connects them.
They are circumstantial signs and take precedence over all other signs, except the orders of traffic officers.