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