Shaw believed art should have a moral message.
a. true
b. false

A. True
Shaw did believe that all art should have some kind of 'message' but he wouldn't have necessarily called it a 'moral message'

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.