The answer should either be Sanction or Embargo.
It promoted the (relatively) rapid diffusion of immigrants, language, and domesticated crops and animals. Those factors are examined in excellent detail in Jared Diamond's book, "Germ, Guns and Steel" which I highly recommend for anyone studying the development of world cultures. It's a long read, but well worth it.
Answer: Posters and newspapers were put up, a politician spoke and friends of friends encouraged each other to join as well. They figured knowing it was easier to have someone they know recruit more men than someone they didn’t know so it was easier to convince them.
Explanation:
B. Learning to domesticate plants and animals changed the way
