As a result of the phenomenon observed by Bela Balassa regarding the price of services in poor countries versus rich countries: a. official statistics may understate how poor the people in poor countries are. b. official statistics may overstate how poor the people in poor countries are. c. official statistics may understate how rich the people in rich countries are. d. it may be the case that there really is no difference between living in a poor country and living in a rich country