Final answer:
A client classified as Emergency Severity Index level 2 (ESI-2) is a high-risk patient who should not wait and must be seen by a physician within 15 minutes to address potentially life-threatening conditions or prevent deterioration.
Step-by-step explanation:
The nurse is caring for a client who meets the criteria for the Emergency Severity Index level 2 (ESI-2). According to the Emergency Severity Index (ESI), a five-level emergency department triage algorithm, a client at ESI-2 level is considered a high-risk situation, or one in which the patient should not wait to be seen by a physician. Patients classified as ESI-2 require immediate life-saving intervention or are at high risk for deterioration and therefore should be seen by a physician very quickly. The correct answer is B) Within 15 minutes.