Option 1 -> Contradicts the passage which mentions "similarities between the Bushveld rocks and Martian rocks."
Option 2 -> The discovery of deep subsurface life on Earth suggests subsurface environments on Mars could also harbor life, not just the surface.
Option 3 -> The passage explicitly states that similarities between Bushveld rocks and Martian rocks suggest "the same techniques could identify life on Mars."
Option 4 -> No information in the passage compares the age of potential Martian microorganisms to Earth's.
Hence, Option 3 -> Suzuki's research demonstrates that the techniques used to identify ancient microbes in Earth's deep subsurface rocks (DNA staining, advanced microscopy) can be applied to similar Martian geological structures, providing a practical methodology for detecting subsurface life on Mars -> correct