B.exercise because static stretch and rest aren't physical which wouldnt move muscles
The structure that forms cranial nerve I is the olfactory nerves while forming the 2nd is the optic nerve. Together with retina and olfactory epithelium, all of them are considered part of the Central Nervous System — wherein they synapse directly to the brain without the aid of any ganglia.
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The chickenpox represent a link of an infectious agent
Its probably personal beliefs or peers. because if your religion doesn't allow you to have sex until a certain age or until your married then that can get in the way. but peers pressure friends/people into doing things they aren't ready for