16. The need for a common medium of exchange led to the rise of A. the barter system B. a money economy C. the guild system
D. the burgesses
17. Peasants were enticed to join the Crusades for all of the following reasons EXCEPT
A freedom from feudal bonds
B. the promise of immediate salvation if killed
C. the possibility of wealth
D the opportunity to become noblemen

the answer is aggresion hope this and mark me as brainiest and add me as friend

ok whats to talk about were you scared or what?

i believe it would influence their own way of understanding things. it shall be a foundation where they can draw or start an argument.   historians are also  scientists that  have their tools of analysis and expertise to unlock a variety of difficulties such as relationships of man, origin, politics, economy, and culture. based on facts and understanding on these areas, they may shade light to extract ideas and develop options to validate a hypothesis or debunk it.

i would also go with d hope u get it right