Why didn't Dr. Rous recognize the importance of his discovery that a virus could cause cancer in chickens?
A) He didn't realize he'd caused cancer.
B) He couldn't reproduce the effect in mammals and thought it only applied to chickens.
C) He couldn't see the virus.
D) It was only 1909 and people didn't know what cancer was.
E) He couldn't cure the cancer.
Correct Answer:
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