Because their economy was based on mercantilism, why were the colonies so important to Britain? A) The colonists provided raw materials and markets for finished goods.
B) The colonists provided necessary tax revenue.
C) The colonists sent soldiers to serve in the British army.
D) The colonists protected the land from being taken over by France,

I would personally say "A) The colonists provided raw materials and markets for finished goods."

Explanation:

Mercantilism itself is believing in profitable trading/commercialism. The Colonies produced vast amounts of Raw Materials and valuables like Grain, Sugar, and Tobacco. The British Parliament also passed many The Navigation Acts over the years, basically preventing the Colonies from Trading with anyone other than Great Britain.

yes i can of course like what is it gonna be about

the tariff was created to protect industry in the northern part of the united states. industries in the north were being driven out of business by imported goods that were priced at a low rate. the goal was to protect these industries   by taxing the goods.