There exists the same question that has the following choices.
A. Comintern.
<span>B. Free Workers. </span>
<span>C. Solidarity. </span>
<span>D. Knights of Labor.
</span>
The correct answer is letter C. Solidarity that was legalized in October 24, 1980
At the end of the Civil War, the communication system that the
railroad used to coordinate their complex flow of rail cars is through the
telegraph. This is used for transmitting messages with the use of a wire in
which is a way of making signals in means of breaking and making an electrical
connection.
