Consider the following partial definitions for class One and the someFun$().$ class One$\backslash \{$ private: int $\backslash ($ x $\backslash )$; public: float $\backslash ($ y $\backslash )$; protected: double z; friend void someFun$()$; $\backslash \}//$Definition of the someFun void someFun$()\backslash \{\backslash \}$ Why has the someFun$()$ been defined in class One as a friend function? Note: This question has partial points. To allow someFun having access to the private members of class One. To allow someFun having access to the protected members of class One. To allow someFun having access to the public and protected members of class One. To allow someFun having access to the private and protected members of class One.