GWD1-14汇总讨论中没有问过的问题，求教！

hhl3000

答案A没有问题     可是觉得B怎么排除呢？以前的讨论中说ANY 太 绝 对 ，不绝对吧？只要能推出来就行啊！极其困惑！

Q14:
That the application of new technology can increase the productivity of existing coal mines is demonstrated by the case of Tribnia's coal industry.  Coal output per miner in Tribnia is double what it was five years ago, even though no new mines have opened.

Which of the following can be properly concluded from the statement about coal output per miner in the passage?

A. If the number of miners working in Tribnian coal mines has remained constant in the past five years, Tribnia's total coal production has doubled in that period of time.

B. Any individual Tribnian coal mine that achieved an increase in overall output in the past five years has also experienced an increase in output per miner.
C. If any new coal mines had opened in Tribnia in the past five years, then the increase in output per miner would have been even greater than it actually was.
D. If any individual Tribnian coal mine has not increased its output per miner in the past five years, then that mine's overall output has declined or remained constant.
E. In Tribnia the cost of producing a given quantity of coal has declined over the past five years.

hhl3000

up

ShangGMAT

我也有问题  我选的是E

x_vampire

与楼主同问：B 应该怎么理解。