Read the following context and choose the best option to answer the question.
Context: Nothing makes me happier than being part of an energized , high - caliber , collaborative team , intent on making a difference for our customers ! And these days , I ' m beyond happy ! One of the things that I relished about working at MSDN was the ability to really know our customers / users .
Question: What is a customer ?
Options: 
A. A customer is a user .
B. None of the above choices .
C. A customer is a someone you can really know .
D. A customer is a worker at MSDN


A