The answer to this question is C. Depressants
I think it is D because your responding to the cold from stimuli and by creating heat to keep your body the average temperature it is homeostasis.
Letter A. This is true it is caused from bacteria on the skin.
Answer: both are made up of lipid bilayers. Main functions of both membranes are protection and transportation. Both are extremely important for the cell survival.
Hope this helps!
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