The Cumulative Effective Dose (CumEfD)limit Does Not Include

The cumulative effective dose (CumEfD) limit does not include
1) exposure acquired as a consequence of a radiation worker undergoing medical imaging procedures.
2) radiation exposure from natural background radiation.
3) radiation exposure received while radiographers perform imaging procedures on patients.

A) 1 and 2 only
B) 1 and 3 only
C) 2 and 3 only
D) 1,2,and 3