The Saying,"In Times of Change,the Learners Inherit the Earth,while the Learned

The saying,"In times of change,the learners inherit the earth,while the learned find themselves beautifully equipped to handle a world that no longer exists" refers to the need for salespeople to:

A) constantly improve their knowledge, skills, and abilities.
B) always scope out the competition first.
C) have a degree in selling as a prerequisite for any position.
D) do their job the way they learned it in college.
E) do all of the above.