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多項選擇題

Given:

Which two, inserted at line 11, will allow the code to compile?()

A.public class MinMax<?> {
B.public class MinMax<? extends Number> {
C.public class MinMax<N extends Object> {
D.public class MinMax<N extends Number> {
E.public class MinMax<? extends Object> {
F.public class MinMax<N extends Integer> {

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