PRECARIOUS:（）

A．A group of taste neurons is found which only responds to sweet taste when stimulated by sweet foods.
B．A brain-wave analysis of a rat genetically engineered to lack a sense of sweet tastes is nevertheless found to have a sense of sour tastes.
C．Most tastes are found to have strikingly different neurological effects on humans they do upon animals.
D．A brain-wave analysis of a hamster demonstrates a similar pattern of activity in a given neurological area for both sour and ,sweet stimuli.
E． A group of taste neurons is found which provides insufficient information for taste discrimination.

A．demonstrate a case where the implications of the labeled-line hypothesis clearly do not hold
B．show the limits of experimental inquiry in determining the role of the individual neuron in taste
C．explain the necessity for determining the extent to which visual perception is analogous to gustatory perception
D．provide further corroboration for the predictions made by the across-pattern model of taste neurology
E． prove the salient differences between taste perception in humans and in animals