Which of the Following Best Describes the Trend in the Share

Which of the following best describes the trend in the share of income received by the lowest 20% of families in the United States? The lowest 20% of families receive

A) 15% of the income,and their share has been rising since WWII
B) 25% of the income,and their share has been falling since the 1960s
C) Less than 5% of the income,and their share has been slowly declining since the 1970s
D) A share of income approximately equal to that received by the top 20% of families,and their share has remained stable since the 1960s
E) 10% of the income,but their share has been falling since WWII