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Let (Z, *) be an algebraic structure, where Z is the set of integers and the operation * is defined by n * m = maximum (n, m). Which of the following statements is TRUE for (Z, *) ?
- A(Z, *) is a group
- B(Z, *) is a monoid
- C(Z, *) is an abelian group
- DNone of these
Correct answer: D