GWD8-Q40 一定帮帮我~~~ 谢谢~~

GWD-8-Q40:

From 1973 to 1976, total United States consumption of cigarettes increased 3.4 percent, and total sales of chewing tobacco rose 18.0 percent. During the same period, total United States population increased 5.0 percent.

If the statements above are true, which of the following conclusions can be properly drawn?

A.      United States manufacturers of tobacco products had higher profits in 1976 than in 1973.

B.       Per capita consumption of cigarettes in the United States was lower in 1976 than in 1973.

C.      The proportion of nonsmokers in the United States population dropped slightly between 1973 and 1976.

D.      United States manufacturers of tobacco products realize a lower profit on cigarettes than on chewing tobacco.

E.       A large percentage of United States smokers switched from cigarettes to chewing tobacco between 1973 and 1976.

选B

我想问下，这类有关百分比的题有什么思路伐？？

因为我一看那百分比就有晕过去的感觉，就不想看了。。。而且也搞不清里面的关系。。。

谢谢~~！！！

如果看都不想看了，那没有好招...当数学做好了,搞清楚充分必要性

哎呀。。。真不好意思了。。。

。。。。。。。