For the answer to the question above, I believe the answer among the choices that you have given is multiple choice letter D. <span>Africans and Europeans shared immunities to Old World diseases.
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The answe to your question id B
Answer: Food and Drug Act
Explanation: Within months, two pieces of legislation resulted from Sinclair's novel: The Pure Food and Drug Act and the Meat Inspection Act, both signed into law on June 30th, 1906. Sinclair was an instant celebrity and a Socialist hero, and was finally financially stable.