In Recent Times,many Foraging Groups Have Been Exposed to the Idea

In recent times,many foraging groups have been exposed to the idea of food production but have not adopted it.Why?

A) They did not have the skills or tools to do so.
B) Their own economies provided a perfectly adequate and nutritious diet, with a lot less work.
C) People naturally resist change, especially foragers.
D) They had to ask permission from the state to do so.
E) They did not realize the advantages of food production.