Identify ALL CORRECT motivations for the ratification of the Fifteenth Amendment in 1870. A) A belief that Democrats would increase in representation in Congress. A belief that newly passed Black Codes would restrict recently freed slaves from voting C) A belief that black men getting the right to vote would pave the way for women to get the same right. D) A belief that Western states would use popular sovereignty to restrict the voting rights of freed slaves. E) A belief that the Confederacy would attempt to reestablish their military might through the political process.​

A and B

A) A belief that Democrats would increase in representation in Congress. B) A belief that newly passed Black Codes would restrict recently freed slaves from voting

Explanation:

the american rail road was the most influential and useful transportation system developed in the 1800's with steam locomotives and in the very late 1800's and early 1900's diesel electric locomotives being used to transport goods and people around the newly expanded united states!

i believe it would influence their own way of understanding things. it shall be a foundation where they can draw or start an argument.   historians are also  scientists that  have their tools of analysis and expertise to unlock a variety of difficulties such as relationships of man, origin, politics, economy, and culture. based on facts and understanding on these areas, they may shade light to extract ideas and develop options to validate a hypothesis or debunk it.