Answer:
the lines , it is key to look at the legend
<span>As
in any developing country, labor and employing companies always had
their differences. The Knights of Labor group was the first well
recognized labor union and it was all inclusive, meaning almost anybody
(women, blacks and but not Chinese) was welcomed. I think the Chinese
were admitted at a later date. After the American Federation of Labor
(AFL) was formed, the Knights of Labor fell out of favor and
disappeared.
The major difference was the Knights of Labor formed the foundation upon
which the AFL was born. Their demise was a natural evolution of the
labor movement in this country. The Knights of Labor lacked good
management and their inability to carry out successful strikes for their
members caused their ranks to be recruited by the AFL. </span>
The Answer would be 3. those brought through the space trade in Africa.
