Expendable items are items that 

Under certain circumstances, a service or procedure is partially reduced or eliminated at the physician's discretion. The service provided can be identified by its usual procedure number and the addition of modifier _________ signifying that the service (not a fee) is reduced

A) -32 B) -51 C) -52 D) -21

An example of a radiolucent structure on a radiograph is ____

A) enamel B) metallic restoration C) pulp D) bone