3. In response to ongoing invasions into the Byzantine Empire during the sixth and seventh centuries, Emperor Heraclius reorganized the military by OA. creating the theme system
OB. recruiting farmers into the military
OC. collecting higher taxes
OD. requiring military service from all men in the empire.

A.

Explanation: Creating the Theme System

"Most scholars now agree that it was Heraclius who initiated the Militarization of Anatolia, known as the theme (military district) system, which was further developed and extended by his successors."

Just took the test and it was correct on PF.

on november 6 and 7, 1917 (or october 24 and 25 on the julian calendar, which is why the event is often referred to as the october revolution), leftist revolutionaries led by bolshevik party leader vladimir lenin launched a nearly bloodless coup d'état against the duma's provisional government.