Identify the correct statement. a. In some of the industrialized countries, the income per person declined between 1990 and 2009. b. Most of the developing countries have been growing at a uniform rate since 1990. c. The average product per person has grown faster in the developing countries than in the industrialized countries since 1990. d. The developing countries are expected to catch up with the average per capita income in the industrialized countries in near future.