Griffith's Experiment Was One of the First That Suggested There

Multiple Choice

Griffith's experiment was one of the first that suggested there was a "factor" that was transferred between different bacteria. In the series of steps of his experiment, what was injected into the mouse in step "c" and what did this prove?

A) Killed S strain bacteria were injected into the mouse and the mouse lived. This proved the "factor" could only work in live cells.
B) Killed R strain bacteria were injected into the mouse and the mouse lived. This proved the "factor" could only work in live cells.
C) Live S strain bacteria were injected into the mouse and the mouse lived. This proved the "factor" could only work in live cells.
D) Live R strain bacteria were injected into the mouse and the mouse lived. This proved the "factor" could only work in live cells.