Read the following paragraphs and answer the question.
It began as just another research project, in this case to examine the effects of various drugs on patients with a severe mood disorder. Using an advanced brain scanning technology—the clumsily named echo-planar magnetic resonance spectroscopic imaging (磁共振光谱成像) procedure, or EP-MRSI -researchers at Boston’s McLean Hospital scanned the medicated and unmedicated brains of 30 people with bipolar disorder in order to detect possible new treatments for the more than 2 million American adults who suffer from the disease.
The project described in this paragraph aimed at finding（ ）.
A、
who had bipolar disorder
B、
what improved people’s moods
C、
whether magnetic scanning was a treatment for depression
D、
how patients with a mood disorder responded to certain drugs
【正确答案】：D
【题目解析】：
根据第一句话“检查各种药物对严重情绪障碍患者的影响。”可知选项D符合题意。
