Final answer:
A new resident must be seen at least once every 30 days in the first 90 days according to standard healthcare regulations in assisted living and long-term care facilities.
Step-by-step explanation:
The frequency with which a new resident must be seen in the first 90 days typically depends on the regulations of the specific healthcare setting or the policies of the governing body. However, given the multiple-choice nature of this question, the correct answer would be C) At least once every 30 days.
This is a common standard in many assisted living, long-term care, and skilled nursing facilities to ensure the well-being and proper assessment of a new resident. It's critical for the healthcare provider to monitor the resident's health status and adjust care plans as needed.