Which of the following is true when restoring an endodontically treated tooth?
A. If more than 2mm of coronal tooth structure remains, the post design has limited role in the fracture resistance of the restored tooth.
B. Stresses are increased as post length increases
C. Fiber made posts are advantageous in canals with noncircular cross sections or in canals with extreme taper
D. Increasing the post diameter increased retention