The invention of the cotton gin.
Answer:Native peoples of America had no immunity to the diseases that European explorers and colonists brought with them. Diseases such as smallpox, influenza, measles, and even chicken pox proved deadly to American Indians. Europeans were used to these diseases, but Indian people had no resistance to them.
Explanation:
Washington served as a general and commander-in-chief of the colonial armies during the American Revolution, and later became the first president of the United States, serving from 1789 to 1797
An important difference between the freedom rides and unauthorized marches were Freedom rides were testing whether an existing law would be upheld, while unauthorized marches were intentionally breaking an unjust law. The correct answer is C.
