Select all the correct answers. Which two requirements needed to be met before Oklahoma joined the United States?
A. Oklahoma Territory and Indian Territory would have to join as one state.
B. A state constitution had to be written meeting certain requirements.
C. Arizona and New Mexico would also have to join the United States at the same time.
D. Oklahoma would have to give up its right to have senators for two decades.
E. Oklahoma would have to ban the use of statewide initiatives.