The definitions of PlainBox, ToyBox and MagicBox are given below: template class PlainBox \{ private: // Data field ItemType item; public: // Default constructor PlainBox(); // Parameterized constructor PlainBox(const ItemType\& theltem); // Mutator method that can change the value of the data field void setitem(const ItemType\& theltem); //Accessor method to get the value of the data field //Accessor method to get the value of the data field ItemType getltem() const; \}; // end PlainBox enum Color \{BLACK, RED, BLUE, GREEN, YELLOW, WHITE } template class ToyBox : public PlainBox \{ private: Color boxColor; public: ToyBox(); ToyBox(const Color\& theColor); ToyBox(const ItemType\& theltem, const Color\& theColor); void setColor(const Color\& theColor); Color getColor() const; I these member functions are inherited from the base class void setitem(const ItemType\& theltem); ItemType getitem() const; *I \}; // end ToyBox template class MagicBox : public PlainBox \{ private: bool firstitemStored; public: MagicBox(); MagicBox(const ItemType\& theltem); void setItem(const ItemType\& theltem); \}; // end MagicBox Which of the following implementations is correct for the setltem member function in MagicBox? [set/tem function in MagicBox magically changes any item to be placed inside to a copy of the first item it ever held.] a) template void MagicBox::setitem(const ItemType\& theltem) \{ if (!firstitemstored) \{ setItem(theltem); firstitemStored = true; // Box now has magic \} // end if \} // end setitem b) None of these answers b) None of these answers c) template void MagicBox>:: setitem(const ItemType\& theltem) item = theltem; firstltemStored = true; // Box now has magic \}// end if \} // end setltem d) template> void MagicBox::setitem(const ItemType\& theltem) \{ if (!firstitemStored) \{ PlainBox>:: :Im lltem(theltem); firstltemStored = true; // Box now has magic \} // end if \} // end setitem