Answer:
Option: d. Political rivalries between European powers motivated rulers to establish rival empires in the Americas.
Step-by-step explanation:
After Spanish got hold of gold and silver mines in America, attracted the European powers to establish their colonies in New World. By establish colonies in America generated wealth for the European empire and to stay stronger from the rivalries. European established rival empires in America to control larger territories/land and resources in a larger amount from one another empires to remain powerful.