How useful are source B and source C to a historian studying the collapse of League of Nations (12marks) PLZZZ HELP WILL GIVE LOADS OF POINTS FOR THE BEST 12 MARKER

ALSO SOURCE B IS THE SPEECH AND SOURCE C IS THE PICTURE

after world war ii, the united states and the soviet union were the major economic, military, and political powers. the world was bilateral multipolar bipolar unilateral

after world war ii, the united states and the soviet union were the major economic, military, and political powers. the world was bipolar.  

the great leap forward, mao zedong's plan to increase china's agricultural and industrial production, was an overwhelming success. true false

the great leap forward, mao zedong's plan to increase china's agricultural and industrial production, was an overwhelming success. true.

explanation:

b is the answer i am assuming

the name of the theory is landmass theory.