I know it's late but I think the answer is D because B or crescendo means the loudest point reached in a gradually increasing sound. and A or consonance means a combination of two (or more) tones of different frequencies that results in a musically pleasing sound. And last but not least C means how the tempo, melody melodic, and harmony harmonic materials are combined in a musical composition, determining the overall quality of the sound in a piece.
Sorry it took so long to answer ⊙﹏⊙∥ ＞﹏＜
