Answer:
I believe it is B) John Philip Sousa
Explanation:
According to https://www.smithsonianmag.com/smart-news/john-philip-sousa-feared-menace-mechanical-music-180967063/
"Sousa was concerned that recording would cause “social decline,” he writes, as people stopped making music together.
I believe what John meant by 'social decline' would be the answer to your question.
I hope this helps!