A Friend Tells You That Shaving More Frequently Causes Hair

Multiple Choice

A friend tells you that shaving more frequently causes hair to grow back darker and coarser than before. You think this sounds correct, so you vow to only shave once a week. In this case, you have fallen victim to a phenomenon known as:

A) truthiness.
B) better-than-average effect.
C) confirmation bias.
D) introspection.