What does this sign indicate?

What does this sign indicate?
A)Steep uphill gradient.
B)Slippery slope.
C)Steep downhill gradient.Correct
This sign indicates the danger of a steep downhill section of road. The number shown indicates the gradient percentage. The uphill and downhill gradient signs should not be confused: on the uphill gradient sign the numbers go up, and on the downhill gradient sign they go down.