Question: Consider the relation schema R={A, B, C, D} with an unknown set of functional dependencies: What is the maximum number of (candidate) keys that R

Consider the relation schema R={A, B, C, D} with an unknown set of functional dependencies:

What is the maximum number of (candidate) keys that R may have? Design a set of functional depen- dencies on R to achieve the maximum number of (candidate) keys. Justify your answers.

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