Enceladus is a small satellite of Saturn that is wrapped in thick ice and contains oceans. Recently, the Cassini unmanned detector detected a vapor column ejected from a crack in the surface of Enceladus Hydrogen molecules that are present in the scientists. Based on this, scientists have concluded that between the rocky core of Enceladus and the ocean below its ice shell, a hydrothermal chemical reaction is likely to occur, which means that Enceladus has almost conserved life. The necessary conditions, in the future, humans can explore Enceladus to find signs of life. If one of the following is true, the above argument is most questioned? ['The Cassini probe has orbited Saturn for 13 years, and no life was found on Enceladus.', 'Sulfur and phosphorus required for life have not been found in Enceladus.', 'On the earth, hydrogen in hot springs under the sea can serve as food for microorganisms and the basis of complex ecosystems.', "Earlier evidence obtained through the Hubble Telescope that no signs of life on Jupiter's moons exist."]