What contributed to the rise of war lords in japan?

a. private families supported large armies.
b. civil wars increased the powers of the court.
c. the warrior clans banded together in truces.
d. the heian government overpowered private armies.

 A. Private families supported large armies.

Explanation:

Heian government came to rely on the private armies instead of their own army.

The increase in the private families’ power led to the growth of two of Japan’s greatest warrior clans, the Taira and the Minamoto.