the complexity of the music surprised us.\na clarity\nb elegance\nc volume\nd intricacy

Answer

Brief Explanations:

"Complexity" means the state or quality of being intricate or complicated. "Intricacy" also refers to the quality of being complex and detailed. "Clarity" is about being clear; "elegance" is about grace and style; "volume" is about the loudness. So "intricacy" is the closest in meaning.

Answer:

D. intricacy