Allergies are caused by which of the following? A. Ingesting IgA in breast milk B. Autoimmune diseases C. Strong toxins in the environment D. Reactions to antigens

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Allergies are caused by reactions to antigens.

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Asked 1/30/2016 7:34:09 PM

Updated 1/31/2016 3:19:57 AM

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Edited by selymi [1/31/2016 3:19:55 AM], Confirmed by selymi [1/31/2016 3:19:57 AM]

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A surface receiving sound is moved from its original position to a position three times farther away from the source of the sound. The intensity of the received sound thus becomes A. three times as low. B. nine times as high. C. three times as high. D. nine times as low.

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Updated 1/30/2016 8:14:32 PM

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A surface receiving sound is moved from its original position to a position three times farther away from the source of the sound.The intensity of the received sound thus becomes nine times as low.

Added 1/30/2016 8:14:32 PM

This answer has been confirmed as correct and helpful.

Confirmed by selymi [9/10/2016 3:14:10 AM]

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