On a vertical number line, a point that is 10 units below 0 corresponds to -10 on a horizontal number line. Without the actual points labeled A, B, C, and D, I cannot definitively tell you which point corresponds to -10.
However, you should look for the point that represents -10 on the horizontal number line. If one of the points listed is labeled as -10, that would be your answer. Please check the values assigned to each point to identify the correct one.