Which of these was NOT found by the Stardust probe during its visit to Comet Wild 2?

Name: Which of these was NOT found by the Stardust probe during its visit to Comet Wild 2?
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The Stardust probe, which collected samples from Comet Wild 2, did not find possible fossilized life-forms. It did find craters, gas jets, and amino acids among other things, but the discovery of fossilized life-forms similar to those found in Mars meteorites was not among its findings.

Which of These Was NOT Found by the Stardust Probe