Every Time You Go to the Grocery Store, You Try

Multiple Choice

Every time you go to the grocery store, you try to wait in the shortest line. But the lines always seem to be roughly the same length. Why?

A) Random chance equalizes the length of the lines.
B) Other people are trying to choose the shortest line too.
C) The cashiers work at the same speed.
D) The cashiers do not have an incentive to work faster.