Which of the following instructions can cause a normal person to develop a mild, temporary form of obsessive-compulsive disorder?

A) "Try not to think about a bear."
B) "Describe the last time you saw a bear."
C) "Imagine that you are being attacked by a bear."
D) "Draw a large full-color picture of a bear."

Instruction A, "Try not to think about a bear," can lead to a paradoxical effect where the person ends up thinking more about the bear, a phenomenon related to the white bear problem or the ironic process theory. This can cause a temporary, mild obsession, similar to patterns seen in obsessive-compulsive disorder (OCD), where individuals struggle to control unwanted thoughts.