Which of the following political entities was not a part of former pre 1990 Yugoslavia?

<h3>Which of the following political entities was not a part of former pre 1990 Yugoslavia?</h3>

I can't find the answer in my textbook or online. Here are the choices:

A.) Albania
B.) Montenegro
C.) Croatia
D.) Slovenia
E.) Macedonia

One of these is the answer. If you find it, can you point towards a source? Thanks so much to whoever finds it, because I've spent an hour on this question.
Thanks everyone for helping me with the answer! I'm level one, so it won't let me vote or give points! This is very much appreciated!


<strong>Albania best answer:</strong>
<p><i>Answer by Katherine M</i><br/>Albania</p>
<p><strong>Albania: Catherine Ashton meets President Bujnar Nishani</strong>
<img alt="Albania" src="http://farm9.staticflickr.com/8105/8654783731_193ecf3c45.jpg" width="400"/><br/>
<i>Image by <a href="http://www.flickr.com/photos/68987276@N05/8654783731">European External Action Service - EEAS</a></i>
Remarks by EU High Representative Catherine Ashton at the end of her visit to Albania:
<a href="http://www.consilium.europa.eu/uedocs/cms_Data/docs/pressdata/EN/foraff/136807.pdf" rel="nofollow">www.consilium.europa.eu/uedocs/cms_Data/docs/pressdata/EN...</a> </p>

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