How was the research conducted?

参考解析：

细节理解题。根据第二段中的“Experts performed...on 20 volunteers”和第三段中的 “using cutting-edge MRI brain technology”可知，研究者使用磁共振成像检查技术对参与者的大脑进行检测，故选B项。干扰项分析，根据第二段中的“Experts performed functional magnetic resonance imaging (MRI) (磁共振成像) scans on 20 volunteers and conducted an online survey of 2,000 people”可知，专家们对20位志愿者进行了机能性磁共振成像检查，同时对2000名群众进行了网上调查，所以A项是错的；根据第四段中的“Volunteers were also interviewed at great length two times”可知，对参与者进行的是两次非常细致的(at great length)采访，故排除C项；根据第三段中的“The 20 volunteers were shown images of landscapes, houses, and other locations, as well as personally meaningful objects”可排除D项。故选B。