Final answer:
The nursing process phase demonstrated is the planning/outcome phase, where the case manager sets goals and negotiates services for patient care. The correct multiple-choice option is (c).
Step-by-step explanation:
The phase of the nursing process being demonstrated when a case manager contacts providers to negotiate services and prices is the planning/outcome phase. This phase involves setting goals and desired outcomes for a patient's care and planning the specific interventions needed to achieve these goals. The case manager's tasks described are part of developing a plan of care that includes securing the necessary services at optimal prices, which is critical for the patient's overall healthcare plan.
The correct multiple-choice option is (c).