The purpose of the 1964 Freedom Summer Project promoted by SNCC in Mississippi was

The 1964 Freedom Summer Project was designed to draw the nation's attention to the violent oppression experienced by Mississippi blacks who attempted to exercise their constitutional rights, and to develope a grassroots freedom movement that could be sustained after student activists left Mississippi.

Explanation:

The oppression experienced by Mississippi blacks at the time was very intense.

i also think he is correct. i believe they came to washington to protest their rights.

interest groups send representatives to state capitals and to washington, d.c. to put pressure on members of congress and other policymakers. they engage in lobbying, or the organized process of influencing legislation or policy. lobbying can take many forms. interest groups can testify in congressional hearings.