Correct Option: A

Seleucus I was a leading officer of Alexander the Great’s League of Corinth and one of the Diadochi. In the Wars of the Diadochi that took place after Alexander’s death, Seleucus established the Seleucid dynasty and the Seleucid Empire. His kingdom would be one of the last holdouts of Alexander’s former empire to Roman rule. They were only outlived by the Ptolemaic Kingdom in Egypt by roughly 34 years.