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

真性红细胞增多症的诊断标准是（）

A.红细胞容量增多：男>36ml／kg，女>32ml／kg

B.动脉血氧饱和度≥92％

C.HGB≥170g／L

D.脾大

E.以上都是