Identify a true statement about the function of knowledge workers.

A$.$ They modify knowledge created by others, but do not create knowledge themselves.

B$.$ They work in a monotonous workplace and lack innovation.

C$.$ They create, modify, and$/$or synthesize knowledge as a fundamental part of their jobs.

D$.$ They use knowledge to perform their jobs, but do not create knowledge.

E$.$ They lack the ability to solve non$-$routine problems at work.