<em>Baruch S. Blumberg invented </em><span><em>a vaccine for smallpox for which he won noble prize in 1976.</em></span>
Answer:
i'm pretty sure that it's D
Explanation:
scientific theory is an explanation of some aspect of the natural world that can, in accordance with the scientific method, be repeatedly tested, using a predefined protocol of observations and experiments.
A colony controlled directly by the English king was known as a Crown colony
