German physician Robert Koch performed an investigation to understand how diseases are transmitted. He isolated bacteria from a cow that had anthrax disease, then injected the bacteria into a healthy
mouse. He observed that the mouse developed the disease and died.
What evidence does the results of the investigation provide?
OA. The disease is transmitted from a healthy cow to a healthy mouse through bacteria.
OB. The disease is transmitted from a healthy mouse to a healthy cow through bacteria.
OC. The disease is transmitted from a diseased mouse to a healthy cow through bacteria.
OD. The disease is transmitted from a diseased cow to a healthy mouse through bacteria.