Suppose that you are asked to convert the C standard library function strcpy into object-oriented form. Which prototype below is the nearest to that definition? a. const Cstring Cstring::strcpy(Cstring&); O b. void Cstring::strcpy(Cstring); O c void Cstring::strcpy(const Cstring&); Od. Cstring& Cstring::strcpy(const Cstring&);