A nurse is providing a back rub to a client immediately after administering a pain medication,with the hope that these two actions will help decrease the client's pain.This is an example of which phase of the nursing process?

A) Assessment
B) Diagnosis
C) Implementation
D) Evaluation

Providing a back rub is a nursing intervention, which falls under the implementation phase. The nurse has already assessed the client's pain and given medication, and evaluation of the effectiveness of the interventions will come later. A diagnosis is not needed in this situation as the client's pain was already identified and treated.