Six States Were Created from the Western Territories in the Years

Six states were created from the western territories in the years 1889-1890. These states were not admitted before 1889 because:

A) Democrats in Congress were reluctant to create states out of territories that were heavily Republican
B) the lawlessness of many western towns discouraged Congress from admitting the territories as states
C) polygamy, as practiced by the Mormons in the West, was unacceptable to Congress
D) if large mining firms had been forced to pay state taxes, they would have had to close down
E) the cattle ranchers lobbied for continued open range as regulated by the territorial legislatures