Answer:
A. Interchangeable parts made mass production easier and cheaper.
Explanation:
2. the relationship of Native Americans with most European groups at first were rather peaceful then turned sour over time especially with the British and least the French.
3. Indentured servant were people were immigrants receiving an american passport as pay. To work on their farm or bushiness for how many years they opted to, usually multiple years.
4. Slave trade started in the colonies for cheap work. As most employers couldn't afford to pay their workers.
5. The head right system was a legal land grant for people. Who would help populate the colonies.
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Life expectancy around the year 1800 was only about 36 years, so "middle age" (or median of lifespans) would be only about 17 or 18 years of age. By the time young people reached their late teens, they typically were expected to be working, married and carrying adult responsibilities.
Those life expectancy numbers can be a little misleading, though. A main reason that average life expectancy was only in the mid-30s is because infant mortality rates were very high. For persons who survived their childhood into adulthood, there was a good chance they lived to a much older age than 30-something.
