Even though the instructions for mixing paint colors were quite clear, the supervisor training the new hardware store clerk had the clerk watch a demonstration of the mixing of a can of paint and then had the clerk mix a can on her own. The supervisor then critiqued the clerk's performance. The trainer used _____ to set the stage for learning.

A) shaping
B) enactive mastery
C) knowledge management
D) behavioral modeling
E) task segmentation

The supervisor used behavioral modeling by providing a demonstration of the desired behavior (mixing paint colors) and then having the clerk imitate it, followed by feedback and critique. This is a form of observational learning and is an effective method for setting the stage for learning. Shaping and enactive mastery involve gradually building up a skill or behavior through practice, while knowledge management and task segmentation involve organizing and presenting information or breaking down a task into smaller parts, respectively. While these techniques may be used alongside behavioral modeling, they are not the primary method used in the scenario described.