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In a super type/subtype hierarchy, each subtype has (a)Only one super type (b)Many super t

In a super type/subtype hierarchy, each subtype has (a)Only one super type (b)Many super t

In a super type/subtype hierarchy, each subtype has
(a)Only one super type
(b)Many super types
(c)At most two super types
(d)At least one subtype
(e)Not at all.

Johnson 27-Dec-2017

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