Question: Let, D = <A, R> be a directed graph or digraph,then D’ = <A’, R’> is a subgraph if ___________

Options

A : A’ ? A and R’ = R ? (A’ x A’)

B : A’ ? A and R ? R’ ? (A’ x A’)

C : R’ = R ? (A’ x A’)

D : A’ ? A and R ? R’ ? (A’ x A’)

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