A Good Description for a Condyloid (Ellipsoidal) Joint Is

A good description for a condyloid (ellipsoidal) joint is

A) flat or slightly curved articulating surfaces.
B) one articulating surface is convex and fits into the other surface which is concave.
C) oval-shaped projection fits into an oval depression.
D) one bone articulates with another like a rider in a saddle.
E) the only synovial joint that allows triaxial movement.