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What is the hierarchical database model uses the hierarchic sequence that always starts at

What is the hierarchical database model uses the hierarchic sequence that always starts at

What is the hierarchical database model uses the hierarchic sequence that always starts at?
(a)  The right side of the tree                   (b)  The left side of the tree                   
(c)  The top of the tree                                                         (d)  The bottom of the tree
(e)  Middle of the tree.

Johnson 02-Jan-2018

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