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      Question

      The walls and ceiling of an auditorium are covered with

      fibrous material, such as glass fibre, to
      A Beautify the auditorium Correct Answer Incorrect Answer
      B Reduce the cost of construction Correct Answer Incorrect Answer
      C Make the auditorium fire-proof Correct Answer Incorrect Answer
      D Absorb sound and prevent echoes Correct Answer Incorrect Answer

      Solution

      The walls and ceiling of an auditorium are covered with fibrous materials to absorb sound and prevent echoes.

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