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The wooden plank or slab of concrete or stone usually provided at the bottom of an entrance door is called:

  • A.shutter
  • B.door frame
  • C.threshold
  • D.reveal

Answer: C

The wooden plank or slab of concrete or stone usually laid at the bottom of an entrance doorway is called the threshold, which forms the base of the door opening. A shutter is the movable leaf of the door, the door frame is the fixed assembly of posts and horizontal members that holds the shutter, and the reveal is the vertical side surface of the wall opening, left exposed where the frame is set back. None of those is the member laid at the bottom.

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