What change took place when arab armies conquered persia?

the dominant cultural group was destroyed.

the economic center of the country moved.

the people’s religion changed.

the language of the conquerors was adopted.

the first phase of the government’s plan for settlement was building the transcontinental railroad. the railroad provided a way to bring settlers and manufactured goods west and ship their agricultural and mining produce east. the transcontinental railroad was an essential artery for rapid development of the frontier.

the second phase of the government’s plan was a liberal land distribution policy that made it possible for many people to homestead. with these two key elements—transportation and cheap land—the government rapidly achieved its goal of persuading people to move west, settle on farms, and push back the frontier.

b.

developed countries have tended to improve the environment, while developing countries have tended to damage it.