Test Results Show Carpets Provide Valuable Acoustic Qualities in Three

Test results show carpets provide valuable acoustic qualities in three areas of concern. Which of the following are those areas?

A) Concert Halls, Public Speaking Halls, Banquet Rooms
B) Walking traffic areas, Large public spaces, Conference/Meeting rooms
C) Surface noise reduction, Impact noise reduction, Airborne sound absorption.
D) Airborne noise pollution, Room noise transference, Reduce echo transmission in large areas.