Some states allowed slavery. Others did not. This difference was mainly a result of . A. economic differences in the North and South B. religious differences in the North and South C. differences in English policies D. the influence of the frontier

A. economic differences in the North and South

Explanation:

The economy of the Northern part of United States is dependent on industrialization, where by manufacturing and production of goods is the main point of the economy activities. Its economy favoured tariffs and which protects the factory owners and workers from competition.

On the other hand, the economy of the Southern part of United States is dependent on agriculture, where by, they relied heavily on the enslaved labour force, to work on their plantation farms, because it is cheaper to maintain.

Hence, due to the economic differences in the North and South, some states (southern states) allowed slavery, while others (northern States) did not.

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the roman army grew in size and became dominant in the mediterranean region.