In 1933, nationalist china under chiang kai-shek's rule was unsuccessful in defending which part of china against japan's aggressions? a. north c. east b. south d. west

The correct option is A; NORTH.
In 1931, China began to resist the expansion of Japanese influence in its territory and this led to series of conflicts between the Chinese and the Japanese; the first conflict occurred in 1933. During this period, China defended its northern part against aggression from Japanese, but their defense was not successful.