Answer:
A. Grew as they became centers of trade because of their location.
Explanation:
The Middle colonies spanned the Mid-Atlantic region of America and were temperate in climate with warm summers and cold winters. These colonies were called the "breadbasket,” due to the huge amounts of wheat, oats, barley, and rye grown there.
In the middle colonies, typical small farms were most suitable for the nature of the soil and crops, which required careful maintenance. Public ownership was also found in cities across the region, and usually the three fields extending south to Delaware were first public, and the processing order was discussed each year at a general meeting. Later, when the cities grew and became strong enough to protect remote fields from raids, arable and forest lands were divided. In the middle colonies, the land system was essentially the same as in New England, but in its character and in its results. Small farms dominated solely.
People in the middle states engaged in fur trade and, as was the case in New England, the production of a number of household items: carpentry, blacksmithing and leather crafts were common in every community, just like a spinning wheel, a loom and a wheelbarrow could be found almost in every house.
Manufacturing production was widely developed precisely in the middle colonies.
