Definition: In this task, you're given a statement and three sentences as choices. Your job is to determine which sentence can be inferred from the statement. Incorrect choices change the meaning in important ways or have details that are not mentioned in the statement. Indicate your answer as 1,2, or 3 corresponding to the choice number of the selected sentence.
Input: Statement: New research links these periodontal bacteria to heart disease, diabetes, low birth-weight babies, and other nastiness you'd expect from bacteria running wild in the bloodstream. Choices:  1. Research shows periodontal bacteria can contribute to other serious health issues. 2. The new research was done with much stricter guidelines than previous research. 3. Research indicates there's no link between periodontal bacteria and heart disease or diabetes.

1