What was feudalism
a. a multi-tiered manor system that exchanged land for loyalty
b. a system whereby you had to fight for your right to land
c. a system developed to protect the peasants and prevent lords from getting to much power
d. a system involving manors, lords, and slaves

A) a multi-tiered manor system that exchanged land for loyalty .

explanation:

japan participated in world war i from 1914 to 1918 in an alliance with entente powers and played an important role in securing the sea lanes in the west pacific and indian oceans against the imperial german navy as the member of the allies.

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.