Stephen Douglas proposed the Kansas-Nebraska Act in 1854. This act opened the area of Kansas and Nebraska to which of the following people?
A.
anti-slavery groups only
B.
pro-slavery groups only
C.
Native Americans only
D.
pro-slavery and anti-slavery groups

Kansas–Nebraska Act, In early 1850, Clay proposed a package of bills that would settle most of the pressing issues before Congress. Clay's proposal was opposed by President Zachary Taylor, anti-slavery Whigs like William Seward, and pro-slavery Democrats like John C. Calhoun, and congressional debate over the territories continued.