Most likely because shortly after Texas's becoming a union state led to war with Mexico, likely causing the death of many Texans
They surrendered to the United States Of America in World War two because of the Us bombing them with the atomic bomb
The answer is D. New York
The factors that made the Trans-Mississippi West unique are the social relation and the struggle of it between the white Anglo and Spanish people and the change of environment in the dry environment. Other factors include role of federal government in the economic and social growth and the presence of American Indians even after they got defeated.
I just read up about that and i was thinking but it only makes sense that the answer is d