It failed because China is a land of the proletariat and the ruling party is a communist one while the fifth modernization was about introducing democracy. Since the party represents the working class and the will of the people in theory, democracy is against it since it would enable those who are against the party to also compete which would in theory mean that they are against the people.
The right answer is C) Edward Braddock. Major General Edward Braddock (1695-1755) was commander-in-chief at the beginning of the French and Indian War (1754-1763) and, in 1755, he led a massive expedition aimed at capturing Fort Duquesne, in Pennsylvania, which had been built by the French. The expedition, however, was a failure, and Braddock died at the Battle of the Monongahela - also known as Braddock's Defeat - that ensued.
