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Which of the following is NOT a reason why it is difficult to obtain absolute ages...

Which of the following is NOT a reason why it is difficult to obtain absolute ages from many rocks. A. Many rocks do not have minerals that can be used to date their crystallization, recrystallization or deposition b. Methods of absolute age determination are expensive c most rocks that can be dated are radioactive and dangerous to sample

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c) Most rocks that can be dated are radioactive and dangerous to sample.This is not the reason why it is difficult to obtain absolute ages from many rocks because exposure to radioactivity can be taken care by using appropriate safety measures such as shielding,use of dosimeters and other general precautions which can protect from exposure to radiation.We would not have been able to know the age of many rocks and fossils if it was life threatening.

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