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← ScienceWhich outcome predominates as radiocarbon dating nears limit?
A)Statistical uncertainty becomes overwhelmingly large✓
B)External contamination dominates artifact activity
C)Isotopic fractionation alters carbon ratios
D)Background radiation masks sample signature
💡 Explanation
As carbon-14 levels diminish near the detection limit, radioactive decay becomes statistically harder to distinguish from zero flux decay; therefore, the uncertainty increases severely, rather than background dominating, which can be mitigated with shielding.
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