What is a contextual interview?

What is a contextual interview?
A . A contextual interview takes place at any other location than the location where the user’s interaction with the interactive system usually takes place, for example in a neutral environment, not their home or in a shop.
B. An contextual interview takes place in a neutral environment, for example in a meeting room.
C. A contextual interview takes place at the location where the user’s interaction with the interactive system usually takes place, for example the user’s workplace, their home or in a shop
D. Establishes focus groups

Answer: C