Which of the Following Was a Consequence of the Battles

Which of the following was a consequence of the battles of Elkhorn Tavern and Honey Springs, Arkansas?

A) Confederate forces gained control of the Arkansas River, giving them a water route into the western territories.
B) After suffering defeat at the hands of a powerful alliance of Indian tribes, Union forces withdrew from the region.
C) Union forces lost control over the portion of the Mississippi River that marked the boundary between Arkansas and Tennessee.
D) The Confederacy lost control of the region, and its operations in Indian Territory were reduced to guerrilla raids.