Gabriel Is Very Small for His Age and Weighs a Fraction

Gabriel is very small for his age and weighs a fraction of what most infants his age weigh. When a social worker visited Gabriel's home, he found very little food. Gabriel's mother confessed that she doesn't have enough money to buy cigarettes, let alone buy baby food. It is apparent Gabriel is suffering from:

A) organic failure to thrive.
B) nonorganic failure to thrive.
C) inorganic failure to thrive.
D) Munchausen's syndrome by proxy.