Which of the following can be found in the epidermis?
a. dead cells
b. blood vessels
c. hair follicles
d. nerve cells

The answer is letter A.  

Dead cells can be found on the surface of the skin. This is because every day the skin sheds dead cells that come from the epidermis which is usually caused by sweat. The epidermis is the outermost layer of the skin which acts out as the barrier of the body against the environment. It prevents infections by protecting the skin from pathogens that may enter the system and it regulates the amount of water that the body releases into the atmosphere in the form of sweat. 

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.