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Indeed,thanks for urs reply.
Please answer the following :
Exposure to sustained noise has been claimed to ---------blood pressure regulation in human being s and, particularly,to increase hypertension,even though some researchers hacve obtained inconclusive results that ----the relationship.
A)--sharpen..conflate
B)--increase..diminsh
C)..aggravate..buttress
d)..disrupt..neautralize
E)--impair..obscure.
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