In order for a driver to graduate from a learner’s license to an operator’s license, how many hours of driving need to be documented? how many nighttime driving hours are required?

depends on which state you're in. in my state (Colorado), you require 50 daytime hours and 10 nighttime hours at least.

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.

Ais the correct one.