Please answer the question based on the following passage. You need to choose one letter from the given options, A, B, C, or D, as the final answer, and provide an explanation for your choice. Your output format should be ###Answer: [your answer] ###Explanation: [your explanation]. ###Passage:In an experiment, a doctoral student and a robot independently answered a set of questions through a computer, and a group of scientists then identified which answers on the computer screen were made by the doctoral student and which answers were made by the robot Yes, and the error rate of the identification result is as high as 78%.Some people think that the set of questions posed in the experiment is definitely insufficient, since they cannot make a group of scientists distinguish the doctoral student from the robot. ###Question:These people's suspicions are based on which of the following unstated premises? ###Options: (A)Some robots are able to play games with chess masters. (B)The doctoral student is a master of Go. (C)That robot is IBM's latest generation product. (D)There was a considerable difference between the doctoral student and the robot. The words with all capital letters should appear at least 19 times.
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