Answer:
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Explanation:
I would say
B: it had been an ocean
Since Trilobites are marine animals that first appeared at the beginning of the Cambrian Period.
Answer:
add a period to it hope this helped
Explanation:
B. In place of reading resources for your research paper.
Answer:
B. Blood pressure
Explanation:
blood pressure: This is a measurement that tells how hard the heart is pumping to move blood through the blood vessels.
