A.The application will crash.
B.The code on line 29 will be executed.
C.The code on line 5 of class A will execute.
D.The code on line 5 of class B will execute.
E.The exception will be propagated back to line 27.

A.assert value == null；
B.assert value != null ： "value is null"；
C.if （value == null）{    throw new AssertionException（"value is null"）；   }
D.if （value == null）{    throw new IllegalArgumentException（"value is null"）；   }