This list describes the main causes of increasing violence between American Indians and the u. s. government in the mid 1800s . Which phrase best completes the list ?

What did executive order 9981 accomplish

Free 99 pts answer before ! i'm just bored

Without stratospheric ozone, which of the following would most likely occur? i. smog over major cities would be greatly reduced. ii. farms would produce surplus crops because of increased photosynthesis. iii. uv radiation would damage phytoplankton and reduce populations of aquatic consumers. i only ii only iii only i and ii i and iii