Pointed,plastic Cones Are Not Used in Dental Radiology Because

Multiple Choice

Pointed,plastic cones are not used in dental radiology because:

A) the cones are difficult for the practitioner to line up correct anatomic structures.
B) the cones cause the production of excess secondary and scatter radiation.
C) the cones require a higher kVp setting on the control panel.
D) the cones require an increase in the time setting.