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← ScienceWhich consequence results when radiocarbon dating nears detection threshold?
A)Isotopic fractionation becomes exponentially distorted
B)Contamination overwhelms remaining signal✓
C)Cosmic ray flux creates false positives
D)Decay constant variation introduces major error
💡 Explanation
Dating accuracy is reduced because contamination introduces other carbon isotopes, triggering significant noise compared to the low carbon-14 signal, overwhelming the **radioactive decay** process. Therefore, measurements are unreliable rather than issues in fractionation.
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