Answer:
D
Explanation:
First when you are troubleshooting a client your main goal is to solve their issue, you dont want to say hey call later i cant help you or say call someone else because picture this you need help and someone hangs up on you or says (B.) or (C.) it comes off as rude i would say. Regarding (A.) im not 100% sure what exactly do you mean by user's site? But asking for their manager (D.) or someone else (preferably higher up) seems to be the right action to be taken.
Answer:
It would be hard to tell if you were being monitored by a network monitoring software, however, you could use a VPN to avoid it. Whenever on a public network you should never use passwords and sign in to things like your online banking.
