In Fredrick Griffith's Classic Experiments

Multiple Choice

In Fredrick Griffith's classic experiments,

A) mice injected with strain R cells died of pneumonia.
B) mice injected with strain S cells died of pneumonia.
C) mice injected with live strain R cells and heat-killed strain S cells died of pneumonia.
D) mice injected with strain S cells, or live strain R cells and heat-killed strain S cells died of pneumonia.
E) mice injected with strain R cells, or live strain R cells and heat-killed strain S cells died of pneumonia.