[Solved] Which of the following is not a major e-commerce public safety and welfare issue? A)regulation of gambling B)regulation of cigarette sales C)regulation of pornography D)regulation of taxation Gerontology: The scientific study of old age and aging. Ontology: The philosophical study of the nature of being, existence, or reality, as well as the basic categories of being and their relations. Morphology: The study of the form and structure of words and their parts in a language. Life Course: The sequence of significant events, experiences, and transitions in an individual's life from birth to death.