Griffith investigated how certain types of bacteria produce pneumonia in mice. The diagram outlines his experiments. The figure shows Griffith’s experiments in which he injected mice with four different samples of bacteria. When injected separately, neither heat-killed, disease-causing bacteria nor live, harmless bacteria killed the mice. The two types injected together, however, caused fatal pneumonia. What happened when the samples of bacteria were injected into the mice? Select all that apply. A. When heat-killed, disease-causing bacteria were injected, the mice were not killed. B. When live, harmless bacteria were injected, the mice did not die. C. When heat-killed, disease-causing bacteria and harmless bacteria were injected together, the mice were killed. D. When heat-killed, disease-causing bacteria were injected, the mice were killed. E. When live, harmful bacteria were injected, the mice died.