All the others are completely false so
Answer is C.
B, destroying the Roman Empire. Although the Greek Civilization was technologically advanced, destroying the Roman Empire was one of their biggest achievements.
The Gulf of Tonkin joint resolution was passed by the US Congress so President Johnson can be authorized to take charge and use the military against Vietnam. The incident happened when the USS Maddox at Tonkin was attacked by Vietnamese using torpedos despite several warnings during a patrol round.
Panese Feudal System
Just like England in Medieval times, Japan also had a feudal system. It was structured very similarly to the English setup with a few changes of names and positions. The most powerful positions in society were the Emperor, Shogun, Daimyo and Samurai. Although these 4 positions were the most powerful in Japan at the time, they made up only roughly 10% of the total population, while roughly 90% were peasants and below.
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The Emperor was looked up to by all of his people as the supreme ruler but held little political power and was seen as more of a 'puppet figure'.
The Shogun was probably the most important figure in Japanese society. He was seen as 'second in line' but did the most work. He was a military leader, so he was in charge of many of decisions to do with their armies, battles etc..
The Daimyo was a very powerful figure who served the shogun. His job control a large area of land. He was also in charge of their samurai, whom he paid to work and protect him.
The Samurai were Japanese warriors (similar to the European knight). They served and protected their Daimyo with respect. They also fought for their people and protected them, bringing justice and order to the community. Their followed a code of conduct called Bushido, meaning 'Way of the warrior' which told them how to live their lives.
Ronins were samurai warriors who had either been 'expelled' from their allegiance or their daimyo had died.
Peasants were farmers and fishermen. They were actually considered a higher class in Medieval Japan than in Medieval England because the Japanese believed that the peasants produced food, which was depended on by all classes, therefore, they worked harder.
Artisans were workers skilled in a particular trade. These included: sword-maker, dressmaker, woodblock print making etc.
Merchants were considered the lowest class in Medieval Japan unlike Medieval England. Their job was to trade/sell goods and shop-keep.