The Reason Why Greece,Ireland,Portugal,and Spain Sometimes Are Referred to as the Eurozone's

The reason why Greece,Ireland,Portugal,and Spain sometimes are referred to as the eurozone's "peripheral countries" is:

A) that all have tourist attractions.
B) that they are situated in the peripheral parts of Europe.
C) that they all rank lower than their EU neighbors in terms of infrastructure.
D) that they are riding on the way of technology boom.
E) that they are all marred by sex scandals.