Definition: 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.
Input: Statement: Several security managers told us that, in addition to reading current professional literature, their involvement with professional organizations was a valuable means of learning about the latest monitoring tools and research efforts. Choices:  1. Security managers also often visit hacking forums to help stay abreast. 2. Learning about the latest monitoring tools by being in contact with professional organizations is a stratagem used by several security managers. 3. Several security managers stated that reading professional literature is a waste of time.

3