A Researcher Finds That the Number of Murders Committed During

A researcher finds that the number of murders committed during a summer is correlated with the number of ice cream cones consumed.However,the researcher realizes that there is a third variable problem related to this finding.What might this problem be?

A) It's possible that people eat more ice cream to console themselves about news that murder is being committed,rather than murder being committed as a result of ice cream sales.
B) High temperatures might be causing both greater ice cream sales and more aggressive acts of violence.
C) Victims of murder cannot be randomly assigned to a condition.
D) The number of murders committed in an area might not only be causing more ice cream sales but also more toy sales.