It can be inferred from Paragraphs Six and Seven thatA．cognitive training turns out to be

It can be inferred from Paragraphs Six and Seven that

A．cognitive training turns out to be effective to treatments for schizophrenia.

B．both Green and Robert Kern doubt the effectiveness of cognitive training.

C．patients of schizophrenia can only receive 15% of treatments for schizophrenia.

D．patients of schizophrenia can always get the effective treatment available.

请帮忙给出正确答案和分析，谢谢！