Why Are Wooden Wedges Used in an Amalgam Restoration

Multiple Choice

Why are wooden wedges used in an amalgam restoration?

A) It holds the matrix band in place along the gingival margin of a class II preparation.
B) It replaces the missing proximal wall or walls of a cavity preparation for a class II preparation.
C) It maintains stability of a matrix band during condensation of a restorative material for a class II preparation.
D) All of the above.