Positive symptoms of schizophrenia include which of the following

A．Waxy flexibility, alogia, and apathy.

B．Flat affect, avolition, and anhedonia.

C．Hallucinations, delusions, and disorganized thinking.

D．Somatic delusions, echolalia, and a flat affect.

在地球上可能出现“日中无影”现象（晴天的时候中午人在太阳下面没有影子）的地区的纬度是（）。

A.南纬23.5度和北纬23.5度

B.0度

C.南纬90度和北纬90度

D.南纬23.5度到北纬23.5度之间