Darcy Is Trying a New Method to Improve His Memory

Multiple Choice

Darcy is trying a new method to improve his memory, and it claims to allow students to learn twice as much material in half as much time. Darcy tries out the new methods for a few days and feels like he was really focused and productive. He tells his friend that he knows that he'll do better on the exam now because this new method has really improved his learning. Which of the following has likely influenced Darcy's experience of the new method?

A) Changes to the strength of classical conditioning.
B) Engagement of mirror neurons
C) Benefits associated with biological preparedness.
D) Changes that can be attributed to the placebo effect.