PT 65 S1 Q15

Researcher: Every year approximately the same number of people die of iatrogenic ... ...

The reasoning in the researcher’s argument is flawed because the argument fails to consider that
(A) prevention of noniatrogenic disease will have an effect on the occurrence of iatrogenic disease
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Dec 2011 LSAT (PT 65): Logical Reasoning A