It means - a forcible overthrow of a government or social order, in favor of a new system.
The election was won overwhelmingly by Aung San Suu Kyi. However, the government refused to honor the results of the election.
It's C it's kind of obvious but then again i am Christian but every one knows about Noah's ark and the forbidden fruit but the garden of eden is a little hard sorry I'm rambling it's C