The centers of trade and manufacturing during the middle ages were the a. manors b. guild c. towns

Towns were the centers of trade and manufacturing during the middle ages.

Explanation:

The middle ages witnessed the greatest initial surge in the manufacturing of various goods. As the manufacturing of goods flourished, so did the trade. These two activities soon began running in sync with each other as the manufacturing expanded. With this expansion, the need for centers of trade and commerce emerged. In line with this need, the development of towns occurred and these towns came to be known as centers of trade and manufacturing.

The answer is a since the earth has different layers