Answer:
Magna Carta's first purpose was to establish peace between King and barons. Given the state of England's roads, summer was the only time of year for military operations. Magna Carta, agreed in mid-June 1215, effectively prevented the outbreak of full-scale warfare.
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<span>Walking Purchase was a 1737 agreement between the Penn family, the proprietors of Pennsylvania, and the Lenape.</span>
Answer:

Explanation:
After the Civil War and 13th Amendment, slavery was abolished from the United States. This left 4 million former slaves or freedmen to fend for themselves while looking for jobs, homes, and educations during the period of Reconstruction.
The Freedmen's Bureau was created by the government to help the freedmen transition. They helped tons of former slaves through meals, healthcare, labor contracts, and the building/funding of schools and colleges.
They attempted to redistribute land (choice C) but most efforts were unsuccessful and it wasn't the main purpose. It was not created for suffrage (choice B) or to help prospective politicians (choice D). This leaves choice A as the best answer.
The columbian exchange was the exchange of wealth, crops, livestock, and most importantly disease between the new and old world. foreign people came into contact with each other and lacked the needed immunity to prevent illness. some crops exchanged were squash, corn, beans, and potatoes.