Which residents can a center or home not accept or retain?

In the context of assisted living, the regulations often dictate the types of care that can be provided based on the facility's capabilities and licensing. A center or home is typically not equipped to handle residents needing continuous medical services, as such conditions require a higher level of healthcare that goes beyond what an assisted living facility can provide.

Continuous medical services involve constant monitoring and care by healthcare professionals, which is characteristic of skilled nursing facilities rather than assisted living environments. These facilities are designed for individuals who can largely manage their own care with some assistance but do not require round-the-clock medical care.

While residents who require bed rails or those needing intermittent nursing services can usually be accommodated within an assisted living setting, continuous medical care signifies a need for a different type of facility. Therefore, the correct answer highlights the limitations of assisted living facilities in caring for those with extensive medical needs.