In Shafer, Edin, and Talbert's Study, How Long Did a Child

in Shafer, Edin, and Talbert's study, how long did a child need to experience a monthly household income below $2-a-day to be considered in chronic extreme poverty?

A) nine months out of a year
B) all twelve months out of a year
C) seven months out of a year
D) four months out of a year