Why wouldn't you use carbon-14 dating on a piece of shell that was estimated to be 1 million years old?
A) Sea shells do not have radioisotopes.
B) Carbon dating is only useful on plants.
C) Uranium dating is better for items older than 1/2 million years.
D) Carbon dating can only be used on items that were once alive.
E) The amount of radioactive carbon in the sample would probably too small to measure.
Answer: E
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