James: Chemists have recently invented a new technique for extracting rhodium, an element necessary for manufacturing catalytic converters for automobiles, from nuclear waste. Catalytic converters function to remove noxious gases from automobile exhaust. The use of nuclear one way to creating a cleaner environment.
Marta: The technique you mention, though effective, is still at an experimental stage, so there has been no shift in the sources of in manufacturing catalytic converters.
What this question is testing
Your task
Describe how the argument proceeds — the technique it uses to reach its conclusion.
Common trap
Answers that describe a method the argument doesn't actually use.
Winning move
Track the role each statement plays, then match that to the choice describing the same moves.
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