Final answer:
The signal person would use Option 3, which is to point down with 2 fingers extended and then tap a tape measure, to indicate a cut of two feet on a job site.
Step-by-step explanation:
When a signal person on a job site wants to indicate a cut of two feet, the universally recognized signal would typically be: Option 3, which is to point down with 2 fingers extended and then tap tape measure. This gesture clearly communicates to the person operating the machinery or making the cut that they need to measure with the tape measure before proceeding. The combination of a pointed direction (downward) and the specific number of fingers extended (two) conveys the measurement, while the action of tapping the tape measure indicates the tool to be used for that measurement.