Given the manner in which the term “pathogen” is used in the passage, ... ...

Given the manner in which the term “pathogen” is used in the passage, and assuming that the prion theory of infection is correct, which one of the following statements must be false?
(A) Nothing that lacks nucleic acid is a pathogen.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in PT70 (Oct 2013): Reading Comprehension