what are the 3 strong reasons for the republic of macedonia could make it into the european union?

Answer 1

There aren't any. Slavic-Macedonia is underdeveloped, poor economy, has tension between the ethnicities (Slav and Albanians) and unable to have friendly relations with its neighbors.
Not likely to enter European Union for at list 20 years.

Answer 2

Even though I do not understand exactly what you want, and from the answers given so far, you are not getting what you need I can share the following with you.

1. Geographically it is in Europe
2. It is a growing economy
3. It has huge potentials (agriculture, mining, metal industry etc etc)
4. Becoming an EU member will help EU define its borders
5. Will help enhance stability and prosperity to the region
6. Macedonian - Albanian conflict? History, both Albanian and Macedonians have the EU as their priority. Not accessing the EU may cause further unrest, not ethnic per se, more of a social or economical unrest.
7. The right to people to travel will be granted, as Macedonians are subject to a severe and unhuman visa regime.
8. It will mean improved economy, therefore a gradual stop to the brain drain, (a macedonian problem) and to the immigration (an EU problem)
ok enough

Answer 3

Macedonia has a good economy, geographically located in Europe and needs to be a member of the EU.