What should you do with that ringing phone?

You’re working on the installation of a new application at an end-users desk, and the user has stepped away for a few minutes. The user left their mobile phone on their desk, and it has started to ring. What should you do?

A) Answer the phone and take a message.

B) Write down the name and number of the incoming call.

C) Let the phone ring through to voicemail. When the end-user returns, let them know that their phone was ringing.

D) Ignore the telephone and pretend that nothing ever happened.