Which definition of classical applies to the sense in which it is being used to define a modern phase for jazz

What does that mean

Generally spontaneous human combustion is something that still bewilders some, human combustion happens very rarely and doesn't affect the surrounding areas, so unless you want to set your self on fire, human combustion will remain spontaneous and very rare.

Ithink that c would make the most amount of sense.

Ithink that the answer is c