The “big-five” approach to personality disorders is receiving recognition. It is now having a great amount of research supporting and being done on it. Further studies are being done for future references. This “Big Five” Theory of Personality Disorders describes all people with personality disorders under five supertraits. Part of this theory is to drop the use of personality disorder categories altogether.
Hm, I think the question here calls for "d", although d would be better defined as a focus on one's own culture, and ignoring other cultures, or seeing other cultures through the lense of own culture.
In a way, prejudice could be a good lead, but only if it said "prejudice towards all other cultures" which is not really feasible (one can't know all other cultures).
so, still, d is best, although there can be ethnocentrism without feeling superior
Americans grew their own food during World War I to conserve supplies so that farms could support soldiers. ... They were intended to reduce the pressure caused by the war effort on the public food supply.
A high way would be a great route