select the correct answer. which pair of variables has a clear causal link between the two named variables…

select the correct answer. which pair of variables has a clear causal link between the two named variables? a. the number of hats sold and the number of mittens sold in a city b. the amount of butter and the amount of bread consumed by a family c. the number of notebooks sold and the number of pens sold in a stationery store d. the number of air conditioners sold per day in a city and the daily temperature e. the number of hours a person can swim and the depth of the pool
Answer
Brief Explanations:
A causal link means one variable directly influences the other. In option D, as the daily temperature increases, the demand for air - conditioners is likely to increase, so there is a clear causal link. In options A, B, C, and E, there is no direct cause - and - effect relationship between the variables. For example, the number of hats and mittens sold may both be affected by cold weather but not directly by each other; butter and bread consumption may be related to family size and eating habits rather than directly to each other; notebook and pen sales may be related to customer needs but not directly causal; and the number of hours a person can swim is not directly caused by the pool depth.
Answer:
D. the number of air conditioners sold per day in a city and the daily temperature