Which Nursing Intervention Strategy Is Most Important to Implement Initially

Which nursing intervention strategy is most important to implement initially with a suicidal client?

A) Ask a direct question such as, "Do you ever think about killing yourself?"
B) Ask client, "Please rate your mood on a scale from 1 to 10."
C) Establish a trusting nurse-client relationship.
D) Apply the nursing process to the planning of client care.