The 1965 selma-to-montgomery march was an important milestone in the civil rights movement because it
vividly illustrated the continued resistance to black civil rights in the deep south
did not encounter any violent resistance
led to the passage of the civil rights act of 1964
was the first major protest after the death of martin luther king, jr.

The 1965 Selma-to-Montgomery march was an important milestone in the civil rights movement because it vividly illustrated the continued resistance to black civil rights in the Deep South.

Explanation:

On Sunday, March 7, 1965, 600 civil rights activists and voting rights activists gathered in Selma to march to Montgomery. The march went well until it reached the Edmund Pettus Bridge. On the other side was a police chain. One of the leaders of the march, Pastor Hosea Williams, tried to talk to the police officer but was told that there was nothing to discuss. Immediately thereafter, the police attacked with batons and tear gas. Seventeen of the march participants suffered serious injuries and one of these was Amelia Boynton Robinson. Pictures of how she was beaten and saved by her friends ended up on the front page of newspapers all over the world. The attack was also filmed by TV, and police brutality aroused sympathy and support not only for the participants in the march but for the entire American civil rights movement.

c: in the east might be the correct answer

answer; collective security;