Question

both the congress of racial equality and the student nonviolent coordinating committee
coordinated protest marches in the north.
organized freedom rides in the south.
organized freedom rides in the north.
organized boycotts in the north and south.

Explanation:

The Congress of Racial Equality (CORE) initiated the Freedom Rides in 1961, and the Student Nonviolent Coordinating Committee (SNCC) joined to continue and expand the campaign, all focused on challenging segregated bus terminals in the Southern United States. The other options are incorrect: the groups' key coordinated action here was the Southern Freedom Rides, not Northern marches, Northern Freedom Rides, or widespread boycotts across both regions.

Answer:

organized freedom rides in the South.