複選題

4.Figure 1 shows the Hasse diagram of a binary relation R. Which of the following statements are incorrect?
  
(A) cRh.
(B) mRm.
(C) dRa.
(D) R is a minimal element.
(E) R isa lattice.

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統計： A(1), B(0), C(1), D(0), E(0) #2993393