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A survey can be used to collect data. For example companies could use surveys on consumers about which product is best. They can use this survey to continue to improve and make sure their customers are involved.
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The Spanish Golden Age (Siglo de Oro in Spanish) was a period of high artistic activity and achievement that lasted from about 1580 to 1680. During this time period, El Greco and Velázquez painted their masterpieces, and Cervantes wrote his famous, satirical novel Don Quixote.
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The main reason was to prevent communism in Vietnam Also to Help reduce the french influence towards Vietnam. Hope this helps!
Some limitations when determining the cause of an event are that other sources that are linked to the event in the same time can usually say things different; It is especially difficult if there is no solid base to the cause and no photographic or written evidence.