This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
Joint cavity has: 
Select and explain. 
A. Tight fibers in upper joint cavity, loose fibers in lower joint cavity., B. Long reinforcing fibers., C. Loose fibers in upper joint cavity, tight fibers in lower joint cavity, long reinforcing fibers., D. All of the above.
C: Loose fibers in upper joint cavity, tight fibers in lower joint cavity, long reinforcing fibers.
Answer: C: Loose fibers in upper joint cavity, tight fibers in lower joint cavity, long reinforcing fibers. 
Explanation: None