During the covid pandemic the phrase "Crisis Standards of Care" jumped from the healthcare planning arena to the popular news. Some hospitals established less than ideal patient facilities, sometimes in tents or sports arenas, to handle the surge in patients driven by covid. Which concept from the module did these actions represent?

A. Unwarranted variations in care due to provider incentives

B. Warranted variations in care due to patient preferences

C. Warranted variations in care due to resource constraints

D. Unwarranted variations in care due to provider preferences