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: Ironically, much of the optimism that life could exist in Europa's ocean arises from the recent discovery that microbes are thriving in an even less hospitable  volcanic vents on the Earth's ocean floor. Choices: 1. The microbes are immune to lava and ice. 2. The discovery of microbes in volcanic vents made the idea of life in Europa's ocean plausible. 3. There are no oceans on Earth, we can find them only on the moon.

1