I would go with choice D) or the fourth option because that shows that the job is so dangerous they have to look at each other to make sure neither one of them has anything dangerous in their hands.
D)People wearing biohazard space suits tend to step around one another like two wrestlers at the beginning of a match, watching the other person's every move, especially watching the hands to make sure they don't hold a sharp object. This cringing becomes instinctive.
This detail indicates how hazardous the work is the best. Other details include information about how they have to tape their cuffs and wear ear protectors. However, these details only hint at the danger of their jobs. D is the best option because it describes the suits as being biohazard space suits. It also shows how important it is that the suits aren't compromised with a tear because they are worried about sharp objects.
