Which fills in the blank in the method signature to allow this code to compile? 

A. ? extends Collection

B. ? implements Collection

C. T extends Collection

D. T implements Collection

E. None of the above

 

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import java.util.*; public class ExtendingGenerics { } private static < list.add(element); return element; > } } public static void main(String[] args) { var values = new ArrayList (); U>U add (T list, U element) { add (values, "duck"); add (values, "duck"); add (values, "goose"); System.out.println (values);