Almost all have a(n) system of government.
a. latin american; parliamentary
b. european countries; parliamentary
c. european countries; separation of powers
d. north american; authoritarian
e. east asian countries; parliamentary

Almost all European countries parliamentary system of government. It is a system of democratic governance of a state. And also executive branch derives its democratic legitimacy from its ability to command the confidence of the legislative branch, typically a parliament, and is also held accountable to that parliament. In a that system, the head of state is usually a different person from the head of government.