In recent years, economists have begun to use height as a measure of health and, indirectly, general well-being. overtime, people in high-income countries have, on average, becometaller, just as people in high-income countries today are taller than people in low-income countries. an analysis of economic indicators suggests that country a has recorded remarkable growth for the last 50 years. a student of economics, who analyzes the economic data as part of his college project, comes to the conclusion that the average height of the country's population should have increased during this period.

which of the following, if true, would undermine hisconclusion?

a.

nutritionists believe that people with access to healthy food often choose less healthy alternatives when economic conditions are difficult.

b.

during this period, the populations of several low-income countries suffered from periodic epidemic attacks.

c.

the government has been firm in its stance of not allowing international fast food chains to operate inside the country.

d.

the country imposed a single-child per family law thirty years ago.

e.

faced with a negative population growth rate, the country relaxed immigration control norms 25 years ago.