Why Is Caution Suggested When Looking at the Annual Poverty

Why is caution suggested when looking at the annual poverty rate?

A) It does not include people who have a total income under the poverty threshold.
B) The rate is inflated based on individuals who have been below the poverty line for years.
C) People who are below the poverty line for 1 or 2 months are not included.
D) Too many households are below the poverty line permanently.