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The reason carbon dating works is that A. there is so much non-radioactive carbon dioxide in the air. B. when a plant or animal dies, it stops producing oxygen. C. plants and animals are such strong emitters of carbon-14. D. after a plant or animal dies, it stops taking in fresh carbon-14. E. none of the above

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egenriether
D.  There is a known constant concentration of C14 in Nature.  As we consume living things to survive our bodies (made of carbon) stop replenishing our body's carbon (we stop eating) and start to decay.  Since we know the 1/2 life of C14 and the ratio of C14 to normal C12 we can determine fairly accurately how long ago a thing stopped consuming carbon (e.g. when it died)
pstnonsonjoku

The correct answer is D: after a plant or animal dies, it stops taking in fresh carbon-14.

When a plant or animal is alive, there is a natural balance between its intake and loss of carbon-14 isotope which is radioactive.

However, when the plant/animal dies, intake of carbon-14 stops but the isotope continues to decay. The longer the plant/animal stays after it dies, the lesser the activity of carbon-14 in the plant/animal.

Hence, we can use carbon dating because after a plant or animal dies, it stops taking in fresh carbon-14 but decay continues.

https://brainly.com/question/1845159

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