Which, inserted independently at line 9, will compile? (Choose all that apply.) : Questions « Utility Classes « SCJP

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import java.util.ArrayList;

class Business {
}

class Hotel extends Business {
}

class Inn extends Hotel {
}

public class Travel {
  ArrayList<Hotel> go() {
    // insert code here
  }
}



A.  return new ArrayList<Inn>();
B.  return new ArrayList<Hotel>();
C.  return new ArrayList<Object>();
D.  return new ArrayList<Business>();