Assume you have the following class declaration:class AAA$\{$public:AAA$($int x$1)\{$x$=$x$1$;$\}$ void setX$($int v$)\{$x$=$v;$\}$int getX$()\{$return x;$)$private:int x;$\}$;a$.$ There is no error in the class declarationb. Error because public methods members are defined before private data members of the classOc. Error because the class has no default constructorOd. Error because the class does not define copy constructor