Correct Answer: B
Explanation:
(B). The foundation of Griffith’s work was that the mice that received the killed Smooth-coat strain/ Rough-coat strain mix, in fact, died. This suggested that the inheritable trait of producing a lethal substance to mice could be inherited by the R-strain bacteria. All the other choices are true and led to the experiment outline briefly in choice (B), but the conclusion of that experiment, once again, was that all the mice died.