In order to expand railroads throughout the country after the civil war, congress

D)
regarded the southern states as conquered territory.

They installed military control over every southern state and made the citizens sign loyalty oaths to be allowed to vote or hold public office.        

The rebellious states did pass Black Codes, but the radical Republicans swooped in and imposed military rule

The bald eagle represent the usa and the features of the flag

To be honest i thinks its between the first answer and the third answer