Answer:
b. You overhear a new hire on the phone at lunch, speaking with her doctor. She is pregnant and no one in the office knows it yet.
Step-by-step explanation:
The information that you should keep confidential is that you overhear a new hire on the phone at lunch, speaking with her doctor. She is pregnant and no one in the office knows it yet because it was a private conversation that you were not supposed to hear and the new hire is talking about personal and medical information that you are not supposed to discuss with anyone because it is her decision to say it and if you do it you will be violating her privacy.