What Is Meant by the Term "Kangaroo Care", Sometimes Used

What is meant by the term "kangaroo care", sometimes used with preterm infants to promote development?

A) Vigorous physical activity (e.g., bouncing) with the child to stimulate the vestibular system.
B) Extensive skin-to-skin contact with mother or father to promote sleep.
C) Swaddling of the infant in a pouch-like wrap to maintain body temperature and promote physical development.
D) None of the above.