Which of the following statements about the Khayal style in Hindustani classical music is accurate?
AAlthough attributed to Amir Khusrau, Khayal flourished in the 18th century under Niyamat Khan Sadarang and Adarang.
BKhayal is considered a lesser form compared to Dhrupad due to its limited creative scope.
CTansen invented Khayal and tabla, making it the most ancient form of Indian classical music.
DKhayal, meaning "melody" in Sanskrit, is strictly bound to long poetic verses without room for improvisation.