If I'm not mistaken it should be (C.)
1- No me hables, 2- No agreges (ajo) al caldo!. 3-No compres (camarones) para mis amigos. 4- Nunca escribas (recetas) en tu mano. ,5- No tengas una olla en el microondas!.
Answer: where there is legally administered bilingualism in bilingual regions or at national borders or where there is a relevant tourist or commercial interest airports, train stations, ports, border checkpoints, tourist attractions, international itineraries, international institutions.
Explanation: I hope this helps probably not but you welcome :)