If a bolt or stud were to break off flush at the surface, which of the listed actions would probably be the best first step to begin the process of its removal?

Correct Answer: Option A — Drill a hole in the center of the broken stud.

Removing a broken stud flush with the surface requires precision. Drilling a centered hole is the essential first step to create a pilot for a screw extractor. This ensures the extractor can grip the stud without damaging the surrounding threads or the parent material of the machinery casing.