Where should you stop when yielding to children or a school crossing guard in a crosswalk?

• In the center of the crosswalk
• At any point in the crosswalk
• At a stop line, not in the crosswalk
  Explanation:

  "When children or school crossing guards are present in a crosswalk, you must yield and stop at the stop line and not in the crosswalk."
• Stop anywhere, as long as it is before the crosswalk