Question

what was the commercial revolution?
a trade war between european countries following the colonization of the new world
the decrease in global trade between europe, the americas, and africa
an enormous change in the rules of commerce due to the columbian exchange
the replacement of colonialism with mercantilism

Explanation:

The Commercial Revolution was an enormous change in the rules of commerce. The Columbian Exchange (the widespread transfer of plants, animals, culture, human populations, technology, and ideas between the Americas and the Old World) led to new trade routes, increased global trade, and changes in economic systems. It was not a trade war (so the first option is wrong). Global trade increased, not decreased (so the second option is wrong). Mercantilism was an economic theory that accompanied colonialism, not a replacement of it (so the fourth option is wrong).

Answer:

an enormous change in the rules of commerce due to the Columbian Exchange