Which Best Summarizes the Way the Household Poverty Threshold Has

Which best summarizes the way the household poverty threshold has been determined in the United States?

A) It is the lowest cost of minimum daily nutrition times 3.
B) It is set at ½ the median household income.
C) It is the dollar income that includes the poorest 20% of households.
D) It is the lowest reasonable cost of food plus housing times 2.
E) The U.S. Congress votes on a dollar amount each year, based on unclear criteria.