Answer:
C
Explanation:I remember being asked this question and I got it right
1963 - protest held sit ins
1963 - mlk arrested
1963 - freedom March
1964 - civil rights
1963 events taken place in different months so this should be correct order
They were being considered as a milestone because it means that the milsetone was being placed as a marker placed along side of the road to tell u the distance is to the nearest city.