Shannon,a Foreign Person with a Green Card,spends the Following Days

Shannon,a foreign person with a green card,spends the following days in the United States. Shannon's residency status for 2010 is:

A) U.S.resident since she was a U.S.resident for the past immediately preceding two years.
B) U.S.resident because she has a green card.
C) Not a U.S.resident because Shannon was not in the United states for at least 31 days during 2010.
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.