The Columbian exchange of crops affected both the Old World and the New. Amerindian crops that have crossed oceans—for example, maize to China and the white potato to Ireland—have been stimulants to population growth in the Old World. The latter’s crops and livestock have had much the same effect in the Americas—for example, wheat in Kansas and the Pampa, and beef cattle in Texas and Brazil. –Alfred W. Crosby "The Columbian Exchange” The Columbian exchange resulted in A) benefits to populations native to the Americas through the introduction of a wide variety of new subsistence crops and livestock, with few negative consequences. B) mostly negative consequences for populations in Europe, Africa, Asia, and the Americas due to widespread communication of disease. C) the decimation of European populations due to the transfer of contaminated foodstuffs and the spread of unknown diseases from the Americas. D) population booms in parts of Europe and Asia due to the introduction of new staple subsistence crops from the Americas.

The correct answer is D. The Columbian Exchange resulted in population booms in parts of Europe and Asia due to the introduction of new staple subsistence crops from the Americas.

Explanation:

The Columbian Exchange was a process that began after 1492, when the Spanish exploring forces under the command of Cristobal Colon discovered and began to colonize the American continent. Through this process, an exchange of resources began to take place between the New World and the Old World, mainly in terms of plants, animals and diseases, which differentially affected each of the human groups that made up both worlds.

Thus, while in Europe and Asia new foods such as corn, tomatoes and potatoes became essential for the subsistence of its inhabitants, in America diseases such as smallpox caused demographic damage. This had a different impact that set the future of each region on fire: in Europe there was an economic and demographic take-off as a result of the abundance of cheap food, while in America it confined a weakened group of natives to submission to the European powers.

i believe the answer is:

-   william jennings bryan is a democrat while mckinley was a republican

at that time, the segment of population that choose for democratic party were the voters with low economic background and vice versa

- william jennings has support of populists and wants to have inflation to farmers while mckinley has support of bankers and businessmen , doesn't want inflation

the fixed value of gold make the large business able to stack up their gold without   being worried that it would devaluated.

- william jennings supported the silver standard while mckinley supported the gold standard

according to jenning, using other metal beside gold could the poor people to have more purchasing power and them advance in the society.

a. the astrolabe could determine the correct latitudinal location of the ship