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题库 / GMATAdvanced-CR-4
Scientist: In an experiment, dogs had access to a handle they could pull to release food into a nearby enclosure that contained a familiar dog and nothing else, contained an unfamiliar dog and nothing else, or was empty. The dogs typically released more food to the familiar dog than to the unfamiliar dog. This suggests that dogs are more motivated to help other dogs they know than to help unfamiliar dogs.
The scientist's argument would be most strengthened if it were true that, in the experiment, the dogs with access to the handle tended to release more food when
the behavior was being encouraged by a familiar person than when it was being encouraged by an unfamiliar person
the enclosure was empty than when it contained an unfamiliar dog
An unfamiliar dog in the enclosure was displaying hostility toward them than when an unfamiliar dog in the enclosure appeared friendly
a dog in the enclosure appeared uninterested in food already released into the enclosure than when it appeared interested in that food
a familiar dog was in the enclosure than when a familiar dog was visible but the enclosure was empty
P：狗“给认识的狗的食物”多过“给不认识的狗的食物”（果）
C：相比于帮助不认识的狗，狗对于帮助认识的狗更有动力（因）
果因推理，他因or否定因果关系，选项必有果
• Athe behavior was being encouraged by a familiar person than when it was being encouraged by an unfamiliar person （削弱，这里提出了他因：狗是被认识的人鼓励这样做的）
• Bthe enclosure was empty than when it contained an unfamiliar dog （无关，果是讲familiar vs unfamiliar，跟empty vs unfamiliar无关）
• CAn unfamiliar dog in the enclosure was displaying hostility toward them than when an unfamiliar dog in the enclosure appeared friendly （无关，果是讲familiar vs unfamiliar，跟hostile unfamiliar vs friendly unfamiliar无关）
• Da dog in the enclosure appeared uninterested in food already released into the enclosure than when it appeared interested in that food （无关，果是讲familiar vs unfamiliar，跟里面的狗有或没有兴趣无关）
• Ea familiar dog was in the enclosure than when a familiar dog was visible but the enclosure was empty （加强，认识的狗在围墙里（给得到）vs认识的狗看得见却不在围墙里（给不到）的时候，给前者更多，说明了狗狗is motivated帮认识的狗）
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