Leapfrogging also know as island hopping is a military strategy employed by the Allies in the Pacific war against Japan during world war 2
Answer to this question it seems to be "A".
The Indians were tired of the British mutiny that is caused. The Indians attempted to escape but failed on many attempts. British rule over the indians lasted from 1857-58
B. Reunification of Germany, even thought the holocuast was terrible, it did have a good out come of bringing together germany (even if it was for a terrible cause)
Korea was required to provide regular tributes to china, while japan was required to provide tributes less frequently