When i bomb is suspected of being planted in a room how is a search for the bomb it generally conducted? a) by dividing the room into quadrants, then sweeping one quadrant at a time b) by type of material metal objects are inspected first, then plastic, then all others c) by height, starting below hip level then working upward, sweeping around the room at each level d) by starting at one end of the room, fanning out, and then proceeding until reaching the other end