What danger did a European nation face by entering into an alliance? It could find itself without military protection.
It might not like the customs of its alliance members.
It might not understand the languages of its alliance members.
It could be drawn into a war it did not want to fight.

4. It could be drawn into a war it did not want to fight.  

Explanation:

seeing as no choices were provided, i'll do my best to answer it from knowledge.

job specialization promotes work ethic to the person doing the job. he/she may be strong in the arms and able to lift things, specializing him/her in a job where you lift and carry.

the western roman empire flourished, but the eastern portion of the empire struggled.