Over the Course of 10 Years,a Country's Population Doubles

Multiple Choice

Over the course of 10 years,a country's population doubles.During this time,its GDP increases from $10 trillion to $12 trillion.Pete,who lives in this country and buys the same goods and services every year,finds that he is still paying the same price for them.This implies that ________.

A) productivity in this country has decreased
B) purchasing power parity in this country has decreased
C) the country's workforce has more than doubled
D) Both A and B