Considering the______of available options for investing one’s hard-earned retirement funds, as evidenced by a plethora of daytime television advertisements aimed at appealing to the incapacitated senior, you may well find it difficult to avoid feeling______.

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． pretended
B． discrepant
C． stable
D． renewed
E． inherent