In Systems Theory, the Concept of Openness Is Illustrated by Which

In systems theory, the concept of openness is illustrated by which of the following?

A) McDonalds actively takes in resources from the environment and returns products to it.
B) McDonalds employees are encouraged to be open to feedback from their peers and supervisors.
C) McDonalds is open to new ideas from employees for producing good service and products.
D) McDonalds is part of the open, unstable, changing environment of fast food restaurants.