A point that is 10 units below 0 on a vertical number line represents -10 on a horizontal number line. Without the specific labels for Points A, B, C, and D provided in your question, it is impossible to determine which point corresponds to -10.
You would need to identify which point on the horizontal number line represents -10 to answer correctly. If you can provide the values associated with Points A, B, C, and D, I can help you identify the correct response.