The right answer is by all means number 2
Mercantilism theory has it that a nation should sell more than it buys from other nations in order to increase its wealth.
Colonies sent raw materials back to mother country where these materials were manufactured to produce goods, these goods were sent back to the colonies to be sold at a higher price,thus, increasing mother country´s wealth by selling more that it bought.
What is more, it was forbidden for colonies to sell materials to other than Mother country, making them economically dependent.
This is basically how mercantilism worked during colonial times