He first Crusade was in the period (1096-1099) and the Fourth Crusade
was in the period (1202-1204)
<span>(1202-1099)----------103 years <span>separated the First and the Fourth Crusades
</span></span>The crusades were a military campaigns with the specific objective of restoring christian control of the Holy Land<span> , were fought
over a period of almost 200 years.</span>
Irrigation systems were used and began to be improved S well so farmers were able to water their crops and not rely on the rain .
C. High Income is the answer, I believe.
Declared the slaves to rebel against the government