Why is the carbon-14 dating not accurate for estimating the age of materials more than 50,000 years old?
A. The concentration of carbon-14 in a body after 50,000 years is too low.
B. Living organisms are too decomposed after 50,000 years.
C. This form of radioactive dating is only accurate back 1,400 years.
D. Actually, carbon-14 dating is accurate back to around 5 million years ago.
Answer: A
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