Hi!
By the word immoderate, they mean excessive, or wanting. I hope this helps you. Let me know if you need more help!
The correct option is 4
They stimulated the economy by increasing trade and creating a need for additional taverns and inns.
The Crusaders opened up the path for Europe to have a relationship with Asia.This led to development of international trade relations that led to the exchange of goods and ideas, and development of taverns and inns along the way.