The kent state protest of 1970
a) is the only recorded war demonstration of the vietnam war era.
b) marked the final significant student protest during the vietnam war.
c) was met with violent force by the ohio national guard, killing and injuring students.
d) is significant because former president johnson participated in protesting the vietnam war.

C)was met with violent force by the Ohio National Guard, killing and injuring students.

Explanation:

Kent State shootings was an event at the University of Kent, Ohio, where a chaotic panorama took place between students and members of the National Guard on Monday, May 4, 1970, in which four students were killed and nine injured (one of they suffered permanent paralysis) at the hands of the National Guard, which shot at the students.

d. direct