Final answer:
During periods of revolution, different groups can organize and take control depending on the specific revolution in question. Therefore, the correct option is a).
Step-by-step explanation:
During periods of revolution, various groups may seize the opportunity to organize and take control. In the context of historical revolutions, the answer to the question 'Who was able to organize and take control?' can vary depending on the specific revolution being referred to.
For example, in the American Revolution, it was the revolutionaries who organized and took control. The revolutionaries, which included figures like George Washington and Thomas Jefferson, led the colonists in the fight for independence from Great Britain and eventually established a new government in the form of a republic.
In the Russian Revolution, it was the Bolsheviks, a political faction led by Vladimir Lenin, who were able to organize and take control. The Bolsheviks believed in violent revolution and establishing a communist regime, and they eventually succeeded in overthrowing the tsarist state and establishing Soviet Russia.
Therefore, the answer to the question depends on the specific revolution in question and could include options like revolutionaries, political factions, military leaders, or intellectual movements.
Therefore, the correct option is a).