Answer:
I think it is the correct answer..Etiology is the study of disease causality
girl's periods get more regular, cramps are more likely.They can be mildly annoying to extremely painful, and they usually last for a few days. Cramps may worry some girls at first if they don't know they're often a normal part of having a monthly period.<span>
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Answer:
straight to brainly because i also help people answer
Bill Paxton had a aortic aneurysm and went to have a corrective surgery, there were complication during the surgery and he died.