An 18-year-old client is diagnosed with mononucleosis and manifests left upper quadrant tenderness and an enlarged spleen. Which is the most important teaching that the practical nurse (PN) should offer this client?

Gargle with warm salt water three times every day and PRN.

Avoid exposing the older client who may develop complications.

Stay at home and isolate from others for two weeks.

Use stool softeners to prevent a valsalva maneuver.