What is the difference between an in-group and an out-group? (this is for sociology)

nigger, that word was originated for white folks   to keep black people under

and when black people use it, they know that's just how they greet each other

and when white folks use it, they know there's a double meaning under

it continues in business

the answer would be c. sediment buildup on continental slope

                                                                                -hope this -