The correct answer is C. According to the online article about Algeria, rai is a type of music.
Rai is an Algerian musical genre started at the beginning of the 20th century. This genre mixes traditional instruments, synthesizers, electronic drums and bass, adapting the old melodies to the current taste. The first rai festival was held in Oran in 1985. Given the enthusiasm of Algerian youth, the government officially recognized rai as national music, a decision described as intolerable by certain Islamist groups, which even murdered certain artists of the rai, such as Cheb Hasni (1968-1994).