What is a transitive relation?

1. A.

   A relation where if a is related to b and b is related to c, then a is related to c

2. B.

   A relation where if a is related to b and b is related to c, then a is not related to c

3. C.

   A relation where every element is related to itself

4. D.

   A relation where every element is related to every other element

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