Final answer:
Physician-initiated interventions are actions taken by doctors to treat patients. The interventions in the given options include administering antibiotics intravenously, enabling progressive ambulation, and checking vital signs regularly.
Step-by-step explanation:
Physician-initiated interventions are actions taken by a doctor to treat a patient's condition. In the given options, the interventions include:
- Administering antibiotics intravenously twice a day to fight off infection.
- Enabling progressive ambulation as tolerated, which means gradually increasing mobility after a medical procedure or injury.
- Checking vital signs four times a day to monitor the patient's health.
Therefore, options a, b, and c are physician-initiated interventions.