During the study, the brains of 14 volunteers were imaged as they performed a decision-making task. The subjects had two buttons before them, each to be operated by a different hand, which they could press when they felt the urge to. They were simultaneously (同时地)shown a stream of letters, which appeared on a screen at half-second intervals (间隔). The volunteers had to remember which letter was showing when they decided to press their button.　

　　Upon analysis of the data, the researchers realized that the earliest signal they could catch started seven seconds before the volunteers reported having made their decision. Given the delay of a few seconds in the imaging, they reckoned (估计) that the brain activity could have begun about ten seconds before the conscious decision. The researchers showed that the signals were picked up from a region (区域)called the frontopolar cortex (脑额极皮层),　which is located at the front of the brain, immediately behind the forehead.　

　　While writing about the observations made during the research in his study report, Haynes said that the frontopolar cortex might be the brain region where decisions are started. He also showed that the next step in the research would be to speed up the data analysis so as to enable his team to predict people’s choices as their brains would make them.

　　1. The passage tells us that ______.　

　　A. we are aware of our whole process of decision-making

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