An Economist Might Say, "The Market Guides and Coordinates Individuals

An economist might say, "The market guides and coordinates individuals' actions." Which of the following is an example of this happening?

A) An employer tells an employee to get to work early.
B) As the price of oranges rises, more individuals begin to produce oranges.
C) The manager of a plant issues a directive that there will be no more smoking in the cafeteria.
D) a and c
E) a, b, and c