The Sale of Christmas Trees and the Number of Suicides

The sale of Christmas trees and the number of suicides are increasing. The increase in Christmas tree sales and death by suicide are probably both explained by the holiday season. During this time of year, a large number of people purchase trees to decorate their homes. Also, during this season, a large number of people become depressed and commit suicide. This suggests that there is a _________________ between Christmas tree sales and suicide.

A) positive correlation
B) negative correlation
C) spurious correlation
D) unreliable correlation