Replying to a private message, for clarifications.
First off, this question comes from GRE Powerprep the most difficult and tricky ones.
Back to the question: as per stimulus we need to challenge what is stated in the passage, I.E to weaken the argument.
Which of the following, if true, would challenge the hypothesis presented in the passage concerning Enceladus and Saturn's E ring? Enceladus is not the only moon orbiting SaturnThis is true and is stated clearly in the passage
Quote:
Researchers suggest that Enceladus, one of Saturn's moons, may be responsible
Enceladus's lack of craters is not due to erasure by water. This is
falseQuote:
This icy moon has no craters, possibly because liquid water from its interior flowed across the surface in the relatively recent past, erasing all preexisting impact features.
No impact has occurred on Enceladus in the past few tens of thousands of years. This is falseQuote:
An impact into Enceladus within the past thousand years or so may have blasted liquid water into space. Water droplets would have frozen quickly into ice crystals, [u]which may then have drifted through the Saturnian system and formed into the E ring[/u].
Hope now is clear. The most important thing is to read veryyyyyyyyy carefully.
regards