Question

the synovial membrane is found where? lining the thoracic cavity covering the outer surface of the body covering the brain and spinal cord lining freely - movable joints

Explanation:

The synovial membrane lines freely - movable joints, secreting synovial fluid for lubrication and reducing friction. It is not related to the thoracic cavity lining, body surface covering, or brain and spinal cord covering.

Answer:

D. Lining freely - movable joints