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 o?

C.The Dow-Jones Industrial Average and careless spending (+)D.Time of the year and home heating bills (+)

noA.In US cities in one year, number of sunny days and per capita income (-)B.Among US adult males, weight and amount of money spent on jewelry (+)E.An automobile's gas mileage and amount of food its driver consumes (+)