问题详情

The results of Trials 1 and 5 are consistent with the hypothesis that heat flow from a hotter wall to a coolerwall is dependent on the:
A.temperature of the hotter wall only.
B.temperature of the cooler wall only.
C.sum of the wall temperatures.
D.difference between the wall temperatures.请帮忙给出正确答案和分析，谢谢！