Which of the Following Is an Example of the Systematic

Which of the following is an example of the systematic bias of being overconfident?

A) About 80% of the people on an Internet dating site rate their looks as very good or above average.
B) A person decides to save his overtime payment this week, but once he receives the payment, he spends it.
C) A person buys a product because it is listed at 80% off an inflated price.
D) People continue to play golf in a rainstorm because they don't want to waste the money they paid on greens fees.