Answer: Differentiable criterion
Step-by-step explanation: In simple words, differentiable criterion refers to the phenomenon of market segments in which the producing entity differentiates its product on the basis of different customer base. The base can be set on the criteria of any factor like gender , age group or religion etc.
Under this criterion the producing entity produces the product by taking special considerations to the preferences of that particular customer group. In the given case two separate groups are responding similarly to a single product, hence, it fails differentiable criteria.