Which sentence below best explains how Samuel Gompers improved the lives of factory workers?
a - Gompers was unhappy with the low wages and long working hours that workers faced.
b - He led the effort to organize the American Federation of Labor (AFL) and became its first president in 1886.
c - Samuel Gompers was a Jewish immigrant who moved with his family from London to New York City as a teenager.
d - He worked as a cigar maker alongside his father.