I believe it is C. Checks and Balances.
Explanation:
The event that triggered the boycott took place in Montgomery on December 1, 1955, after seamstress Rosa Parks refused to give her seat to a white passenger on a city bus. Local laws dictated that African American passengers sat at the back of the bus while whites sat in front.
I believe the answer is: <span>secondary groups; primary group
This happen because primary groups involved in the interaction that happen for the subjects or objects.
Secondary group on the other hand Would only revolves around the interaction that we have personally for ourselves.</span>
....Im trying nnot to laugh... whats the question tho?