Aweatherproof metal junction box measuring 4 m. × 4 m. × 6 in, has been installed to support a luminaire. two rigid metal conduits have been threaded wrenchtight into the threaded entries of the enclosure. the box has not yet been secured to the brick wall. but both conduits have been strapped to the wall 16 in. from the box. what additional support (from the following list) is required for this box? 1. two metal screws with plastic anchons il. two toggle bolts ih. two drive pins

a) none
b) i or il only
c) i or ill only
d) i. ii, or iii 10.