The 1970 killings of protesting students by National Guardsmen at caused many students to increase protest activity on Oklahoma campuses. A.
Oklahoma State University
B.
Ball State University
C.
Washington State University
D.
Kent State University

D. Kent State University

Explanation:

Many American citizens showed their protest in public regarding the Vietnam War. People march to Washington to display their antiwar rally against the government judgment to enter into war. The 1970 students were shot down by National Guardsmen during protests. Many students from colleges protested against the Vietnam War on the basis that the US had no concern about fighting in Asia. Kent State University became a significant place for students to protest against the Vietnam War.

c

explanation:

confederacy: supported slavery, believed states should be able to nullify federal laws, supported low tariffs

union: everything else