Which of the Following Is Not Evidence That Teaching Is

Which of the following is not evidence that teaching is increasingly being recognized as a full-fledged profession in this country?

A) Teachers are investing more time in enhancing their own professional knowledge base through university and college education, staff development, and workshops.
B) Teachers are gaining more opportunities to participate in decision making through efforts such as school-based management.
C) Salaries and benefits for teachers have improved over the last several decades.
D) There is a great deal of variety in what is defined as a "knowledge base" for teaching.