The freedom rides, marches and sit-ins of the 1960s were form of

Sit-Ins and Freedom Riders were whites and blacks that wanted to work together in a nonviolent way to end segregation and protest the Jim Crow Laws in the south that still kept daily life segregated. Sit-ins were first started in 1960. A sit-in was a silent protest in hope to end segregation dealing with public services.

Explanation:

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might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories

d is the correct answer

~courtney