The answer is <span>influence of socialism</span>
"<span>e. Employers used their wealth to buy unfavorable and often unfair publicity" would be the only reasonable option from the list, since the employers wouldn't do things to decrease worker productivity if they could help it. </span>
Although Portugal was the first to use African slaves, Spain first sent them to America
<span>The 15 european countries who met at the berlin conference in 1884 determined the regulation of the European colonization and trade in Africa. It is also known as the Congo conference and the West Africa conference. </span>I hope my answer has come to your help. God bless and have a nice day ahead!