Answer: Adolf Hitler
Explanation: Adolf hitler was the dictator of Germany during World War II, although he was allied with Benito Mussolini, and emperor Hirohito, Germany and the nazis (led by hitler) were to blame for the mass genocide of European Jews, homosexuals, soviet civilians, Roma (gypsies), people with disabilities, jehovahs witnesses, poles, Slavs, Ukrainians, non Europeans, Spanish republicans, political victims, and anyone with different religious views such as Roman Catholics, Protestants, and Freemasons.
I think it might be C, but I am not 100% sure.
<em>Yes and nothing much would change—the discoveries he made and theories he devised would have materialized anyway sooner or later. </em>
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<em>Hope this helps! Have an amazing rest of your day :)</em>