BEFORE THE INVENTIONS OF NEWSPAPERS, RADIO AND T.V, PEOPLE ADVERTI...

12. - DE THI HOC SINH GIOI 12
Tiếng Anh DE THI HOC SINH GIOI 12

12. Before the inventions of newspapers, radio and T.V, people advertised ____

A. on computers B. by shouting and singing about their goods.

C. by drawing electric billboards C. all are correct.