Long run economic growth is so hard to achieve for developing countries because A. there are many variables necessary for development, but none of them are sufficient B. people in developing countries...

Long run economic growth is so hard to achieve for developing countries because

A. there are many variables necessary for development, but none of them are sufficient

B. people in developing countries are poor and lazy

C. they dont have a large population, like the US has

D. they dont have democratic governments