Getting all four samples right was a tough test, but not too tough, we thought, for people who believed they could recognize their brand. In the end, only 7 out of 19 regular cola drinkers correctly identified their brand of choice in all four trials. The diet-cola drinkers did a little worse-only 7 of 27 identified all four samples correctly.

　　While both groups did better than chance would predict, nearly half the participants in each group made the wrong choice two or more times. Two people go all four samples wrong. Overall, half the participants did about as well on the last round of tasting as on the first, so fatigue, or taste burnout, was not a factor. Our preference test results suggest that only a few Pepsi participants and Coke fans may really be able to tell their favorite brand by taste and price.

　　56. According to the passage the preference test was conducted in order to _______.

　　A) find out the role taste preference plays in a persons drinking

　　B) reveal which cola is more to the liking of the drinkers

　　C) show that a persons opinion about taste is mere guess-work

　　D) compare the ability of the participants in choosing their drinks

　　57. The statistics recorded in the preference tests show ______.

　　A) Coca-Cola and Pepsi are peoples two most favorite drinks

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