PT 5 S3 Q15

The Scorpio Miser, with its special high-efficiency engine, costs more ... ...

Which one of the following arguments contains an error of reasoning similar to that in the argument above?
(A) The true annual rate of earnings on an interest-bearing account is the annual rate of interest less the annual rate of inflation. Consequently, if the rate of inflation drops, the rate of interest can be reduced by an equal amount without there being a change in the true rate of earnings.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Practice Set: "Parallel Flaw" Questions, Set 2