Select the TWO answer choices that, according to paragraph 1, indicate what scientists believed before the 1980s about underground organisms. To receive credit, you must select TWO answers

• It was impossible for organisms to live beyond just a few meters underground.
• Organisms were filtered into the soil from ocean sediments.
• Organisms that were supposedly found at great depths were actually from the surface layers
• Contamination from the surface layers of the soil was seriously affecting life underground.

This is a multiple choice.