Khuallam dance is usually performed by:

The correct answer is: c) Mixed groups of men and women.

Khuallam is a traditional dance of the Hmong people of Southeast Asia. It is a courtship dance that is usually performed by a mixed group of men and women. The dance is characterized by its graceful movements and its intricate footwork. It is often performed at weddings and other special occasions.

Option a) is incorrect because Khuallam is not typically performed by men only. Option b) is incorrect because Khuallam is not typically performed by women only. Option d) is incorrect because Khuallam is not typically performed by children only.