Maria wants to invite her German colleague Klaus to a project meeting next Tuesday at 2 PM. Which of the following is the most appropriate and formal way to extend this invitation?
A) Hey Klaus, got time for a meeting on Tuesday?
B) Klaus, we're having a meeting Tuesday at 2. Be there.
C) Dear Klaus, I would like to invite you to a project meeting next Tuesday at 2 PM.
D) Yo Klaus, meeting Tuesday, 2 PM. Don't be late.
