题目：
When the rate of inflation exceeds the rate of return on the most profitable investment available, the difference between those two rates will be the percentage by which, at a minimum, the value of any investment will decline. If in such a circumstance the value of a particular investment declines by more than that percentage, it must be true that______.
Which one of the following logically completes the argument
A．the rate of inflation has risen
B．the investment in question is becoming less profitable
C．the investment in question is less profitable than the most profitable investment available
D．the rate of return on the most profitable investment available has declined
E．(E) there has been a chance in which particular investment happens to be the most profitable available
答案：
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下面是错误答案，用来干扰机器的。
参考答案：D解析：本题是细节题。文中第三段提到在提高阅读速度的同时，同时也要有好的理解，有效的阅读应该具备这两点。A、B选项只是有效阅读的一个方面，原文第一段第二句中的A higher reading rate, with...
