The correct answer is C. Assembly
Explanation:
The right to assembly is one basic freedom in the U.S. and other countries that allows people to gather pacifically and express or defend their ideas. Due to this, the right to assemble is closely related to the action of protesting, which is illustrated by the image because by protesting people join to show they disagree with situations, policies, etc. and show their support of certain ideas. This includes marching to support civil rights, protesting against unfair policies, etc. According to this, the correct answer is C.