C++ quiz. What will the following code print when creating a

What will the following code print when creating an instance of class D?

struct A { A() { cout << "A"; } };
struct B : virtual A { B() { cout << "B"; } };
struct C : virtual A { C() { cout << "C"; } };
struct D : B, C { D() { cout << "D"; } };

ABCD
D
DBC
BCD
ABC

Explanation

The constructor for A will be called only once because virtual inheritance is used.

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