One of the Main Purposes of the Regular Reallocation of Land

One of the main purposes of the regular reallocation of land every few years during the Tang Dynasty was

A) to ensure good land for the nobility.
B) to ensure good land for the peasants.
C) to make allowance for changes in the population distribution.
D) to tame the landed nobility.
E) to make sure the tenant peasants would remain on the land and produce food for urban workers.