In the US Supreme Court Case Atwater V

In the U.S. Supreme Court case Atwater v. City of Lago Vista, the Court:
I. decided the arrest was unreasonable because it was not supported by probable cause.
II. decided the arrest was reasonable because state law allowed it.
III. decided the arrest was reasonable because the offense was serious.
IV. decided the arrest was unreasonable because Atwater was not a flight risk.

A) IV
B) I, II
C) II
D) II, III