In 1790, Haydn moved to Vienna to pursue a freelance career after being fired from his court position at the Esterházy court. This dismissal allowed him to gain independence and explore new musical ideas. His relocation marked a significant turning point in his career, leading to fame and success. ;
Joseph Haydn moved to Vienna in 1790 to pursue a freelance music career after being fired from his court position at the Esterházy court. This dismissal allowed him the freedom to explore new musical ideas, leading to significant success. Therefore, the correct answer is D: being fired from his court position.
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