Spain's economy was based on the system of mercantilism, under

a) the colonies can trade with anyone they want.

b) the home country became richer by controlling the trade of its colonies.

d) the colonies and the home country operated entirely separate of one another.

B. Home country became richer by controlling the trade of its colonies

Explanation:

Mercantilism in the 17th and 18th century Europe meant that colonies could only perform trade through their imperial colonizing country. In the case of Spain, this meant that all goods, products, and resources from the colonies had to be sold via Spain or with permission (and therefore payment of high fees) of Spain, making Spain richer.

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