Consistency again. the words can mean the national anthem, a national anthem or just national anthem. Sometimes this course requires the article, sometimes it doesn't. Sometimes it requires a, or nothing, but disallows the. Sometimes it does the opposite. Consistency, folks, this should have been fixed before the course was even released to beta testing. Edit. This doesn't refer to just this particular prompt, but to many others I've come across.
Couldn't "Taifa" also mean "country" in the same way that country also means nation in English?