The sentence best explains how Samuel Gompers improved the lives of factory workers is:
'He led the effort to organize the American Federation of Labor (AFL) and became its first president in 1886.
So, from this we can conclude that sentence best explains how Samuel Gompers improved the lives of factory workers is:
'He led the effort to organize the American Federation of Labor (AFL) and became its first president in 1886.
Learn more about Samuel Gompers here:
brainly.com/question/6203490?referrer=searchResults
brainly.com/question/1109013?referrer=searchResults