Answer:
a. True
Step-by-step explanation:
The statement is true because the gap between composer and performer in the twentieth century did indeed contribute to the fragmentation of the classical music world. The traditional relationship between composers and performers became more distant as composers started exploring more avant-garde and experimental styles, often requiring specialized techniques and unconventional approaches to performance. This led to a divergence in priorities and aesthetics between composers and performers, resulting in a fragmented landscape where different musical ideologies and practices coexisted. The shift in dynamics between composer and performer contributed to the diversification and fragmentation of classical music during the twentieth century.