問題詳情

63  5e4ca5609712b.jpg
Which three are valid? (Choose three.)  1. p0 = p1;  2. p1 = p2,  3. p2 = p4;  4. p2 = (ClassC)p1;  5. p1 = (ClassB)p3;  6. p2 = (ClassC)p4;
(A) 123
(B) 126
(C) 235
(D) 156

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