Shannon, a Foreign Person with a Green Card, Spends the Following

Shannon, a foreign person with a green card, spends the following days in the United States. Shannon's residency status for 2012 is:

A) U.S. resident because she has a green card.
B) U.S. resident since she was a U.S. resident for the past immediately preceding two years.
C) Not a U.S. resident because Shannon was not in the United states for at least 31 days during 2012.
D) Not a U.S. resident since, using the three-year test, Shannon is not present in the United states for at least 183 days.