What Would Be One Way to Effectively Test the Ideas

What would be one way to effectively test the ideas of social learning theory?

A) Prime participants with pictures of faces or with numbers before they are asked to complete a math test.
B) Create a novel task for participants to learn, then have them learn the task either with the assistance of experienced others or on their own.
C) Ask a group of inventors and scientists how they came up with their most groundbreaking ideas.
D) Randomly assign participants to complete a task in which they either learn about famous people or learn about famous places, and assess how well they perform on each type of task.