Final answer:
After his legal battles, Beethoven withdrew from public life and focused on composing, producing significant works. This period of his life marks his transition from Classical to Romantic music, reflecting the broader social changes in audience and artistic expression of the time. The correct option is b.
Step-by-step explanation:
The correct answer to the question 'What happened after Beethoven's legal battles?' is b) Beethoven withdrew from public life and focused on composing in seclusion. After his complex legal battles over the custody of his nephew, Ludwig van Beethoven indeed became more isolated.
Despite his withdrawal from public life, his reputation continued to grow as he composed some of his most profound works during this period, such as the late string quartets and the Ninth Symphony.
The Romantic composers, which Beethoven's later works are often associated with, were known to have written for large, public audiences and sought to push the boundaries of what was musically acceptable of their time. They were inspired by classical traditions but sought to express more personal emotion and drama in their music.
Beethoven's style transition from Classical to Romantic exemplifies the shift in the art world where the rise of the middle class and the demand for music broadened the audience base beyond the aristocracy. The correct option is b.