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← ScienceWhich risk significantly increases when radiocarbon dating extremely old organic material?
A)Insufficient remaining isotopic mass✓
B)Cross-contamination due to handling
C)Instrumental background signal variance
D)Variations in initial carbon ratios
💡 Explanation
Instrument sensitivity to minuscule amounts induces greater uncertainty; because the half-life governs radioactive decay, the sample will have reduced ¹⁴C, further reduced signal, therefore an age uncertainty skyrockets at large ages, rather than contamination which can be checked using controls.
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