Which statements concerning the following code are true？（） class a { public a（） {} public a（int i） { this（）； } } class b extends a { public boolean b（String msg） { return false； } } class c extends b { private c（） { super（）； } public c（String msg） { this（）； } public c（int i） {} }

A. The code will fail to compile.
B. The constructor in a that takes an int as an argument will never be called as a result of constructing an object of class b or c.
Class c has three constructors.
D. Objects of class b cannot be constructed.
E. At most one of the constructors of each class is called as a result of constructing an object of class c.