The right choice to your question is A. a chemist who created vaccines against Cholera, rabies and anthrax. ~~~ Check the meaning of Pasteurization.
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The Bay of Pigs invasion failed which caused distrust and increased tensions between the US and Cuba. It brought the Soviets and Cuba closer together because Khrushchev saw what the US tried to do and he asked Castro to be allies. Castro accepted because he needed a strong ally. Khrushchev and Castro start to build missile launchers in Cuba. Thus starting the Cuban Misslle Crisis.
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Among the most lucrative goods transmitted in the Columbian Exchange were sugar, corn, and tea. Columbus himself is credited with bringing sugar to Hispaniola, setting up sugar cane plantations after Spanish miners had exhausted the gold stores there....
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