Increases in Real GDP Over the Past 60 Years Can

Increases in real GDP over the past 60 years can actually underestimate growth in the standard of living for Arabs since the mid of the 20^th century because

A) the level of pollution in the mid of the 20^th century was much higher than it is today.
B) goods and services are more expensive today as compared to the mid of the 20^th century.
C) the quality of health care that exists today was not available in the mid of the 20^th century.
D) the crime rate was higher in the mid of the 20^th century than it is today.