Question: Suppose that A is the set {a, b, c, d} and that R is a relation defined on set A such that R is

Suppose that A is the set {a, b, c, d} and that

Suppose that A is the set {a, b, c, d} and that R is a relation defined on set A such that R is represented by the digraph shown below. Furthermore, suppose that S is the reflexive closure of R. What is S, the cardinality of S ? C a b

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