The World Bank Classifies Persons with Incomes of Less Than

The world bank classifies persons with incomes of less than $3.10 per day (measured in 2011 international dollars) as living in moderate poverty. Between 1980 and 2013, the moderate poverty rate of the world

A) increased from 50 percent to almost 70 percent.
B) increased from 30 percent to almost 50 percent.
C) decreased from 67 percent to 31 percent.
D) was virtually unchanged during this 33 year period.