Answer:
B. The extraction of gold and other wealth from the land in the Americas.
Step-by-step explanation:
After Queen of Spain Isabella came to know about this new land of America, she authorized Spaniards to colonize them and treat them benevolently and Christianize them.
Though this motive of Christianizing the colonists was backed up with a goal to extract gold and other weaalth from the land in the Native America. Their purpose was to restore Spain's economy by acquiring this wealth and gold.
Thus the correct option is B.