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What evidence is used to determine the age of rock by relative and absolute dating methods?
a. relative dating uses fossils and layering order, while absolute dating uses half-lives of radioisotopes.
b. relative dating uses layering order and isotopes, while absolute dating uses fossils.
c. relative dating uses isotopes and fossils, while absolute dating uses layering order.
d. relative dating uses half-lives of radioisotopes, while absolute dating uses layering order and fossils.

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i took this test, the answer is A. hope I helped;p

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