SOLUTION
Causation means that a change in one variable causes a change in another variable. there is a cause-and-effect relationship between variables.
The two variables are correlated with each other and there is also a causal link between them.
Considering the temperature and the amount of drinks sold, the two variables are related and there is a causal link between them since higher the temperature the higher the number of drnks sold.
For other options, you can't really determine the link between the variables.
Hence,
The temperature at a football game and the amount of drinks sold is the best causation relationship.
ANSWER: Option C