D.
The Argument says that there must likely be another reason (other than radiation) for genetic mutations as they reduce when power plant close for maintenance, based on the assumption that radiation lasts for thousands of years.
D.Different radioactive isotopes can decay at different rates depending on the chemicals present at the time of the decay.
As the decay of radioactive isotopes depends on chemicals present, we may conclude that radiation does not always last for thousands of years, hence
...
The Argument says that there must likely be another reason (other than radiation) for genetic mutations as they reduce when power plant close for maintenance, based on the assumption that radiation lasts for thousands of years.
D.Different radioactive isotopes can decay at different rates depending on the chemicals present at the time of the decay.
As the decay of radioactive isotopes depends on chemicals present, we may conclude that radiation does not always last for thousands of years, hence
...
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