Several meanings could be agvined to this. On face value, Dr. King is saying that the men who lynched Emmett Till were morally bankrupt but hid behind Christianity and rationalized their actions for murdering Emmett for allegedly flirting with a married white woman.
The correct answer is C: Building New England towns and cities around a common help colonies develop a diverse economy by making it easier to trade goods. They built their settlements along the Atlantic coast to make it easier for colonist to get supplies from English trading ships, and to send raw material to Europe.