Which of the Following Best Describes the Idea of Creating

Which of the following best describes the idea of creating a 'unified Europe' to maintain peace and to create a common European culture?

A) It is a relatively new idea that has been successfully implemented rapidly.
B) It is an idea that has repeatedly resurfaced throughout European history.
C) It is an idea that is still not fully accepted by European policy makers.
D) It is an idea that emerged in the process of creating the EU.