According to Smith's Contextual View of Incubation,what Should You Do

According to Smith's contextual view of incubation,what should you do if you are stymied during the problem solving process?

A) Stay in the same place as long as it takes to finish the problem.
B) Call someone to come into your current environment,and then both stay there until the problem is solved.
C) Change your current environment;the context change will make success more likely.
D) Go on the Internet and use Google to help you solve the problem.