Given the task definition and input, reply with output. In this task, you're given a statement, and three sentences as choices. Your job is to determine which sentence clearly disagrees with the statement. Indicate your answer as '1', '2', or '3' corresponding to the choice number of the selected sentence.

Statement: His policy succeeded for a time, but following his abdication in a.d. 305, the empire continued to weaken, harassed by invaders and troubled by internal strife. Choices: 1. Invaders harassed the empire because they didn't like his policies. 2. His policies worked but the empire was still very troubled. 3. His abdication took place in 500 A.D.
3