When Susan recovered from the terrible disease, her doctor ______(把此归因于她对未来的信念).

A. the existence of the symphony was attributed to the spread of Near Eastern and Chinese music
B. Near Eastern music had an influence on the development of the instruments in the symphony orchestra
C. the development of the symphony shows the mutual influence of Eastern and Western music
D. the musical instruments in the symphony orchestra were developed on the basis of Near Eastern music