[单选题]
Which of these statements are true for a3xv;p*i wf-*;g egjqsynovial j/ xkwji+ pa1q+oints?
I. The joint capsule produces synovial fluid
II. Synovial joints can move in one direction (plane)
III. Ligaments connect one bone to another
A. I only
B. II only
C. I and III
D. I, II and III