In class, we spoke about "Linux", an open$-$source operating system. We used "Linux" as an example of$?$ Please select the best answer choice below.

A$.$

The co$-$design section of the customer co$-$creation model that we studied in class.

B$.$

The collaboration section of the customer co$-$creation model that we studied in class.

C$.$

The tinkering section of the customer co$-$creation model that we studied in class.

D$.$

The submitting section of the customer co$-$creation model that we studied in class.