An instructor uses multiple forms of media to help the class understand a difficult topic. Unfortunately learners are still having a hard time with the concept. Noticing difficulty, the instructor creates another learning tool to explain the topic another way. Which of the following BEST describes the skill the instructor is using? 

Answer options:

A. Create opportunities for learners to contribute to the discussion
B. Plan and use a variety of reinforcement techniques during training
C. Adapt learning methods as intended by the course designers
D. Enhance, substitute or create media as appropriate

D