How did Jenner form his hypothesis?
He based his hypothesis on prior knowledge of smallpox.
He based his hypothesis on a statement made by a dairymaid.
He based his hypothesis on an observation made during a prior experiment.
He based his hypothesis on the relationship between cowpox and smallpox.
He based his hypothesis on prior knowledge of smallpox.
He based his hypothesis on a statement made by a dairymaid.
He based his hypothesis on an observation made during a prior experiment.
He based his hypothesis on the relationship between cowpox and smallpox.