Which one of the following is most strongly supported by the passage?

Which one of the following is most strongly supported by the passage?
(A) The only way in which CJD can be transmitted is through the injection of abnormally shaped prions from an infected individual into an uninfected individual.
(B) ...
(C) ...
(D) ...
(E) ...

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