Question

their lives inevitably became more complex, but their music retains a lustrous purity and verve. source: time in this sentence, lustrous means: vigorously active brilliant appropriate to a purpose impressive by reason of age

Explanation:

The word "lustrous" typically means having a shine or brilliance. In the context of the sentence, it is describing the music's quality. "Brilliant" fits well as it conveys a sense of shine and high - quality, which is in line with the idea of the music retaining a certain positive and shining characteristic despite the complexity of their lives. "Vigorously active" is more about activity level, "appropriate to a purpose" is about functionality, and "impressive by reason of age" is about age - related impressiveness, none of which fit the meaning of "lustrous" as well as "brilliant".

Answer:

B. brilliant