To Claim a 21-Year-Old Child as a Dependent in 2013

To claim a 21-year-old child as a dependent in 2013:

A) The child must be a full-time student the entire year
B) The child's income must be less than $3,900
C) The child must be a full-time student for at least 5 months during the year
D) Either (a) or (b)
E) Either (b) or (c)