Definition: In this task, you're given a statement and three sentences as choices. Your job is to determine the neutral choice based on your inference from the statement and your commonsense knowledge. The neutral choice is a sentence that neither agrees nor disagrees with the statement. Indicate your answer as '1', '2', or '3', corresponding to the choice number of the selected sentence. If sentence X agrees with sentence Y, one's correctness follows from the other one. If sentence X disagrees with sentence Y, they can not be correct at the same time.
Input: Statement: Advances in FGD technology, design, materials, and expertise available for retrofit installations made over the last decade form a sharp contrast to earlier retrofit systems. Choices: 1. The retrofit systems of today are almost exactly the same as the systems ten years ago. 2. The earlier retrofit systems have been advanced in the past decade. 3. More advances will come in the following decade.

3