The correct answer is:
A response to A Call for Unity, the statement by eight white Alabama clergymen against King and his nonviolent methods.
From the Birmingham jail, where he was imprisoned as a participant in nonviolent demonstrations against segregation, Dr. Martin Luther King, Jr., wrote the "Letter from Birmingham Jail".
It was his response to a public statement of concern and caution issued by eight white religious leaders of the South who accused King of agitating local residents and not giving the incoming mayor a chance to make any changes.
The answer is B , because Spain France and Netherlands got involved to adjust the balance of power they had with the British empire
First, they made settlement of the West possible after the Civil War by connecting farmers (and miners, ranchers, loggers, and others) to markets.
Second, railroads helped to integrate different regions of the country economically.
