(If this is regarding corona virus) Cover your mouth when you sneeze, wash your hands, avoid touching your face, disinfect objects of yours
I’m sorry if it’s wrong, but I’d believe the answer is... heel to toe.
Explanation: Because in my opinion that’s the only one that makes sense. Option 1 is wrong because when you walk to move forward your toes don’t hit the ground first, it’s the heel >>> leading into Option 2. And Option 3 and 4 also don’t make sense so I canceled them with process of elimination.
I hoped that helped
The best Therapeutic response would be to ensure to his coworker that every thing is okay and what they are doing is to help prevent infections.