Consider these declarations:
List strList = new ArrayList();
String ch = " ";
Integer intOb = new Integer(5);
Which statement will cause an error?
(A) strList.add(ch);
(B) strList.add(new String("handy andy"));
(C) strList.add(intOb.toString());
(D) strList.add(ch + 8);
(E) strList.add(intOb + 8);