What impact did the crusades have on the feudal system?

D. They weakened feudalism since many nobles were killed or lost their wealth and fortunes.

Explanation:

There was a decline in the system of feudalism, too, as many nobles sold their lands to fund their travels, freeing their serfs in the process. The conquest of the Muslim-held territories in southern Italy, Sicily, and the Iberian peninsula gave access to new knowledge, the so-called 'New Logic'.

Explanation:

it would be  

germany had to pay all damages related to the war.

and i think

germany had to take sole responsibility for the war.

a memoir is the correct answer