The correct answer to this open question is the following.
The detail that would best support the argument that European expansion in the Americas fueled a commercial revolution could be the number of trade transactions that increased the value of transatlantic commerce between Europe and the Americas.
As part of the Columbian exchange, European colonizers arrived at the Americas because they knew that this new territory had plenty of raw materials and natural resources that could be processed in European factories and then, traded to other parts of the world, including the North American colonies established such as Virginia, Pennsylvania, Massachusetts, New Jersey or New York. This commercial revolution represented a profitable business for many people but affected the Native American Indian tribes that witnessed how their territories were used to exploit resources and this was the cause of many conflicts.