54.Which of the following statements is NOT true? (A) Lawsuits so far have been filed with regards to the seismic air guns. (B) Not only the tiny but also the large sea creatures are harmed by the seismic air guns. (C) The sound of a seismic air gun has not caused the brain bleeding of marine life yet. (D) The sound of a seismic air gun can be detected 4000 kilometers away.