B, because this is answer has nothing to do with American music.
Operant-conditioning is the process by which a response becomes more likely to occur or less so, depending on its consequences. Shaping is an operant-conditioning procedure in which successive approximations of a desired response are reinforced. shaping spontaneous recovery stimulus generalization stimulus discrimination . This process of establishing a behavior was first developed and used by B.F Skinner,
The first one is C and the second one is A
I think...
I think you should wait for another answer just in case
But i hope this helps u