Its B. out of common knowledge and experience <span />
A. Increased quality of health care.
I'm not 100%, but im pretty sure that's it.
Try sleeping in dark quiet room that you are comfortable in. You can also play relaxing type of music such as calm music or nature sounds to help improve sleep. Just relax, and free your mind.
Hope this helps!
<em>~ ShadowXReaper069</em>
