Which set of terms would be most useful in discussing ancient Greek ideas and practice in music?

Question

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The terms "aulos" (a wind instrument) and "ethos" (the emotional or ethical character of music) are the most useful in discussing ancient Greek ideas and practices in music. The aulos was a prominent instrument in Greek music, and ethos was a central concept in how music was understood and valued by the Greeks. The other options are more relevant to architecture (A), drama (B), and poetry (C), and therefore would be less useful in discussing Greek music.

Which Set of Terms Would Be Most Useful in Discussing