Consider an OSPF network with Area $0,$ Area $1,$ and Area $2.$ R$1$ is an ABR for Area $1,$ and R$2$ is an ABR for Area $2.$ If default OSPF configurations are used, which statement below is correct?A$.$ Area $1$ routes are advertised to Area $2$ using Router LSAs originated by R$1.$B$.$ Area $1$ routes are advertised to Area $2$ using Router LSAs originated by R$2.$C$.$ Area $1$ routes are advertised to Area $2$ using Summary LSAs originated by R$1.$D$.$ Area $1$ routes are advertised to Area $2$ using Summary LSAs originated by R$2.$