2ኛ) የምጣኔ ሀብት ዕድገቱ ዘላቂነት ሊሆን የማይችለው እንዴት ነው?
(a) How it is of dubious morality. (b) How it affects evolution. (c) How it enriches the already wealthy. (d) How its effects may not be seen for generations.