Which One of the Following Examples Best Illustrates the Concept

Which one of the following examples best illustrates the concept of distributed cognition?

A) Edie, Linda, and DeWayne discuss various ways they might solve a physics problem.
B) Mark, Jason, and Leanne each solve one-third of their homework problems and then share their results with the other two.
C) Rhonda watches her favorite situation comedy while simultaneously eating an apple and doing her homework.
D) Reginald thinks about the various plots he might use in the short story he is writing and then eventually chooses one of them.