What does the word "demonstrations" most closely mean as it is used in paragraph 5? Police often had to use force to stop these violent protests . In 1970 , a riot at Kent State University in Ohio ended with police officers shooting guns at a few students in the crowd . When other students across the country heard about the incident , they only became more passionate about their demonstrations .

A. The organizing of a democratic group.

B. Protests and rallies.

C. The violent expression of anger.

D. Practical explanations of how to do something.