Question

you should ____ when working with power tools.
○ ensure that machine guards are in place
○ secure your work with a clamp or vise
○ keep your work area clean
○ all of the above

Explanation:

When working with power tools, ensuring machine guards are in place (for safety), securing work with a clamp/vise (to stabilize), and keeping the work area clean (to prevent hazards) are all important safety practices. So "All of the above" is correct.

Answer:

All of the above