Because the Poverty Line Is a Relative Standard, What Can

Because the poverty line is a relative standard, what can we conclude?

A) The poverty rate will not decrease as an economy grows.
B) More families are pushed above the poverty line as economic growth moves the entire distribution of income upward.
C) An increase in the price of food will not have an effect on the poverty rate.
D) The poverty rate has been fairly stable over the last 50 years.