In the Jim Bender video, what are challenges to more widespread adoption of these sort of diversified, integrated agricultural systems?

Question $47$ options:

a$)$

Highly specialized; Clear times to take a long vacation; Lots of agricultural programs in U$.$S$.$ universities.

b$)$

Management intensive; Hard to take time off the farm; Apprentice in order to master.

c$)$

Management intensive; Easy to take time off the farm; No formal education is required.

d$)$

Highly diversified; Clear times to take a long vacation; Lots of agricultural programs in U$.$S$.$ universities.