Please choose the correct ending to complete the given sentence: Work World: [header] How to deal with a bipolar coworker [title] Refrain from casually sharing their diagnosis with others. [step] Show respect for your coworker by keeping your lips sealed regarding their condition. If their diagnosis is not common knowledge in your workplace, keep what you know to yourself.

Ending1: Even if you think their diagnosis is uncommon, be polite about it and don't keep your thoughts and opinions to yourself. [substeps] Don't pretend that you don't know what they're going through or how they feel. Ending2: You should keep your communications work-related. [substeps] Your coworker may not want others to stigmatize or pity them. Ending3: Your policy as a co-worker could change. Be open to anyone and answer any questions they have, without making it personal. Ending4: If you absolutely must disclose your coworker's mental or physical condition, be discreet and let others know clearly. Expressing any concern for their mental or physical condition will be a recipe for tenating discipline standards in the workplace.

Answer format: ending1/ending2/ending3/ending4