mcdonald's is not known as a vegetarian friendly restaurant. recently, however, mcdonald's test marketed a vegan burger, appropriately name the mcvegan, in finland. while vegetarians were excited about the possibility, sales in the test were slow and mcdonald's has decided to not introduce the item in its stores. it seems that vegetarians just did not frequent mcdonald's. the mcvegan failed which of the key criteria for successful market segmentation?