Final answer:
The federal regulations from November 2016 mandate that healthcare facilities must have adequate nursing staff to meet the needs of their residents, rather than a set staffing ratio.
Step-by-step explanation:
The federal regulations that went into effect in November 2016 do not set staffing ratios. Instead, they require a facility to have adequate nursing staff to meet the needs of its residents. The correct answer to the question is b. Adequate.
This entails that the facility must determine the appropriate level of nursing staff based on the residents' care requirements and various other variables such as the severity of the residents' conditions, the number of residents, and specialized services offered.