Which description most closely matches the term: time critical?

"Time Critical" refers to operational risk management, where when a risk is discovered, the time to alleviate that risk is critical to ensuring safety for people to be able to use an item or be in an environment. The five steps of the process are: Identifying the hazard, assessing the hazard, making risk decisions, implement controls and supervise. In "Time Critical", one must orally go through all these processes, making decisions on the spot in time-compressed situations.

Ithink it would be choices a and b. hope this !