<em>thanks</em><em> for</em><em> your</em><em> </em><em>question</em><em> </em><em>and </em><em>please</em><em> correct</em><em> me</em><em> if</em><em> I'm</em><em> </em><em>wrong.</em>
<em>please </em><em>press </em><em>the </em><em>heart </em><em>and </em><em>brainli</em><em>e</em><em>sts </em><em>answer</em><em>s</em><em> </em><em>and </em><em>5</em><em>s</em><em>t</em><em>a</em><em>r</em><em>s</em><em> </em><em>rating</em>
C, details that help readers visualize the settings better. A wouldn't work because it doesn't help the setting, B doesn't help the setting either and D would only add more confusion so UT would have to be C by process of elimination.
It consist of all clinical disorders and mental illnesses with the irregularity of mental slowness in intellectual understanding and awareness, emotional development etc and personality disorders.