Suppose that a class Fribbit has a constructor, a destructor, and two private data members: class Fribbit { public: . . // Some public operations . Fribbit( /* in */ char* initialString, /* in */ int initialN ); ~Fribbit(); private: char* str; int n; }; The str member points to a C string that is dynamically allocated by the class constructor. Which of the following code segments is the correct body for the class destructor?