Correct answer choice is :
The Cyrillic characters is a writing system adopted for different alphabets across Eurasia, especially in Eastern Europe, the Caucasus, Central Asia, and North Asia. It is based on the Early Cyrillic alphabet originated during the 9th century AD at the Preslav Literary School in the First Bulgarian Empire.
Which best defines Cyrillic?
C: It is an alphabet adapted from the Greeks that is used for Slavic languages.