"<span>Introduction of American plants such as maize to Europe" is the only option that was a part of the Columbian exchange, since this exchange revolved primarily around the exchange of goods from the New World to Europe. </span><span />
The real answer is D. The purpose was the march due to British rule in India.
The best and most correct answer among the choices provided by your question is the fourth choice.
Craft guilds were formed in the Middle Ages <span>to provide structure and support for artisans who shared a trade.</span>
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The Age of Enlightenment promoted a confidence in reason or intellectual enquiry to bring greater happiness and progress to humanity; a belief that all aspects of the human and natural worlds are susceptible of rational explanation; and the desire to battle against ignorance, dogma, superstition, injustice and oppression.
