The fief was an important basis for feudalism because it was the land given by a landlord to a vassal in return for military service
Not only their military service, the vassals were also obligated to give some cut for the landlord for every profit made using the land
hope this helps
The answer to your question is D because cell phones & the Internet are both forms of instant communication.
The new comers had a huge amount of sickness, hunger, and they were very irresponsible.
With war, every country is afraid. They're afraid of possibly being ambushed, becoming in dept, and many other reasons. So by remaining neutral they can sit back and not have to worry about being attacked by any country that's fighting. But that's not always the case now and days. Hope I answered your question correctly.