D.,
A, B, and C have the solution of the system of Equations (2,1) But D has a solution of (1,2).
They passed the Truman<span> Doctrine.</span>
Athens was a direct democracy which means that all eligible citizens voted directly on bills and legislation. Citizens had input in many of the decisions that were made. On the other hand, the US is a representative democracy. This means that voters elect politicians who cast votes on the issues at hand on their behalf.
The most economic event was the civil war i hope this helps
