Answer:
C)
Explanation:
the number of mailboxes and the number of teachers in a city represents association with no causation. Association refers to a relationship between two variables, where one variable may be related to the other in some way. However, causation refers to a relationship where one variable causes the other to occur. In this case, the number of mailboxes in a city is not causing the number of teachers in the city to change, nor is the number of teachers causing the number of mailboxes to change. Therefore, there is an association between the two variables, but no causation.