A and C can work and D is partially true I would go with a or d tho
The event that marked the end of the Roman Republic is often attributed to the defeat of Marc Antony in 31 BC at the Battle of Actium which ended the period of civil war.
Phoque je ne sais pas que les choses sont bizarres
The answer is C. There was concern that U.S. citizens' privacy was being violated.