Given the class definition:

class CreateDestroy
{
public:
CreateDestroy() { cout << "constructor called, "; }
~CreateDestroy() { cout << "destructor called, "; }
};

What will the following program output?

int main()
{
CreateDestroy c1;
CreateDestroy c2;
return 0;
}

a. constructor called, destructor called, constructor called, destructor called,
b. constructor called, destructor called,
c. constructor called, constructor called,
d. constructor called, constructor called, destructor called, destructor called,

d. constructor called, constructor called, destructor called, destructor called,