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 rate of return on the most profitable investment available has declined
D: the investment in question is less profitable than the most profitable investment available
Choose A, B, C or D as your solution.
D