What will be the output of the following C++ code? #include using namespace std; class A public: int x; A(int n = 0) : x(n) ; int& operator[](int n) cout << "0" ; return x; int operator[](int n) const cout << "1" ; return x; ; void foo(const A& a) int z = a[2]; int main() A a(7); a[3] = 8; int z = a[2]; foo(a); return 0;

Answer: Option D