Why are radiometric dating techniques not commonly applied to sedimentary rocks? O A. Sedimentary rocks do not contain radioactive isotopes.
OB. Very few sedimentary rocks contain radioactive uranium.
O C. Most scientists prefer to use index fossils to date sedimentary rocks.
O D. Many sedimentary rocks are made of sediments that came from a variety of locations and formed long before the sedimentary rocks formed.

Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.

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