Answer:
A. Franz Joseph Haydn
Explanation:
Franz Joseph Haydn (1732-1809) is considered the "Father of the Symphony." He composed more than 100 of them, as well as 83 string quartets and dozens of creations in various instrumental, vocal and profane genres. He spent at least half a century working for music. The second movement of his 1797 “Emperor” Quartet was later adopted as Germany's National Anthem.