The following pairs of variables are all strongly correlated (positively or negatively, as indicated), but for only some of them is there a cause-and-effect relationship between the variables. Which of the pairs has a cause-and-effect relationship? Check all that apply.
A.The time of year and the cost of a vacation (+) B.The heights of women's hemlines and the Dow-Jones Industrial Average (+) C.The average weight of cows per state and average income per state (-) D.Number of sunny days in Germany and cost of milk in New York (-)
E.Temperature outdoors and amount of time spent indoors (-)

Question

The following pairs of variables are all strongly correlated (positively or negatively, as indicated), but for only some of them is there a cause-and-effect relationship between the variables. Which of the pairs has a cause-and-effect relationship? Check all that apply. 
A.The time of year and the cost of a vacation (+) B.The heights of women's hemlines and the Dow-Jones Industrial Average (+) C.The average weight of cows per state and average income per state (-) D.Number of sunny days in Germany and cost of milk in New York (-)
E.Temperature outdoors and amount of time spent indoors (-)