Answer: They would be easy to defeat and conquer.
Explanation: This is the only option that is suitable because although his letter doesn't seem to have ill intentions behind it or aggression, it has an underlying message. The kind and queen of Spain only allowed Columbus to travel and explore the unknown because he promised to bring back riches like spices and possible jewels and of the sort. Finding a village on his exploration is like a gold mine because they have had to stay there because there must be something there they are thriving off on, and the queen and king would do anything to get their hands on said thing. They seek land and riches.