The japanese feudal system ,wealthy landowners socail power was based on what
A. the total population of there lands
B. the size of the army and navy
C. the number of temples they built
D. the amount of rice they produced

D.the amount of rice they produced.

Explanation:

The feudal system in Japan emerged during the 12th century. During this period, wealth land owners' social power was based on the amount of rice they could produce in a year.The wealth of the landowners were measured in terms of Koku which was equivalent to approximately 180 metres. Thus, social position of the landowners was measured according to the number of Kukos of rice they produced each year.

Interpreting the results of his experiment : )