Hello there, fellow human being!
The answer is D. unicellular.
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~Ruru
I believe the answer is fish vertebrates. i hope this helped
A) is your best answer.
Relative Dating gives the 'relative dating', which allows one to find the difference of age between many different of fossils. However, radioactive dating is used to get a more exact measurement of a fossil, but it can only be used for certain types of fossils.
hope this helps
if you are using apex the correct answer is 100