What has income per person done during the past 200 years? a. it increased far more rapidly in both developed and less developed countries than during the centuries prior to 1800. b. it increased far less rapidly in both developed and less developed countries than during the centuries prior to 1800. c. it increased in the developed countries of western europe and north america, but declined in the rest of the world. d. it declined in the developed countries of western europe and north america, but increased in the rest of the world?