It was home of people of many religions (Islam, different Christian sects) and many ethnic groups (Serbs, Albanians, Croats). Some people identified as members of those groups, but slowly, sometimes a more unified "Yugoslav" identity was emerging - but not everywhere.
Answer: C. When it’s members communicate informally online
The second stanza of “A Dream Within a Dream” by Edgar Allan Poe is one full of heavy despairing emotion, so it would be C) Despair