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← ScienceWhich consequence results when carbon-14 dating overestimates atmospheric incorporation?
A)Sample age appears artificially older✓
B)Ratio plateaus unexpectedly
C)Instrument calibration deviates slightly
D)Beta decay emissions accelerate sharply
💡 Explanation
An overestimation skews the assumed initial carbon-14 fraction, because radioactive decay causes a naturally decreasing isotopic ratio. Therefore, a sample with less observable incorporation of carbon-14 appears to be older than its actual due to underestimating the isotopic carbon fraction, rather than the reverse.
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