There were tremendous changes for African American civil rights during the 1950s and 1960s. In your opinion, what was the most important cause for these changes? Explain your answer.

it is

a

asked for and recieved from the united states

the

the steam engine.

the locomotive.

the telephone.

the telegraph.

the internal combustion engine.

the rifle.

ironclad ships.

electricity/light bulb.

b) new machinery hope i