What is the most significant limitation that Carl Schurz’s work has, as a resource for a historian?

He was not an eyewitness to the events he describes.
He was too young to be a reliable witness.
He was an employee of the government and likely biased against the revolutionaries.
He wrote his account about fifty years after the events occurred.

true

coz they had the rank system in society according to the economic power of the people

although the crusades failed to capture jerusalem, they had several major impacts on western europe. they increased the authority of the king: sometimes nobles died in battle without leaving an heir in which case the king got their land. kings passed taxes to pay for the crusades.