Emily paints for a living and loves it. She decides how many paintings she will create in any given time period and what kinds of paintings they will be. Fortunately, Emily has the discipline to paint even when she doesn’t feel like it, and she has produced many pieces of art that have sold for good prices on the open market. This is the example of ______________: a. Behavior control b. Output control c. Normative control d. Concertive control