A-controlled area is defined as one.. that is occupied by people who wear radiation monitors

A-controlled area is defined as one:
1. that is occupied by people trained in radiation safety
2. that is occupied by people who wear radiation monitors
3. whose occupancy factor is 1
a. 1 and 2 only
b. 1 and 3 only
c. 2 and 3 only
d. 1,2 and 3