At 2 P.M. on Dec. 5,1945, five Navy bomber

问题：

At 2 P.M. on Dec. 5,1945, five Navy bombers took off in perfect flying weather from the Naval Air Station at Fort Lauderdale, Fla., on a (26) training mission over the Atlantic Ocean. Less than two hours later, the flight commander (27) that he was "completely lost." Then there was silence. A (28) plane was sent to search for the missing aircraft and it, too, disappeared. In all, six planes and 27 men (29) that day without a trace. Despite one of history’s most (30) search efforts, Involving more than 300 planes and dozens of ships, the Navy was unable to (31) even floating wreckage or a telltale oil slick.
This is just one of the many chilling stories told of "The Bermuda Triangle". During the past 30 years, the triangle has (32) the lives of some 1000 seamen and pilots. (33) sailors, it is known variously as "The Triangle of Death," "The Hoodoo Sea" and "The Graveyard of the Atlantic" because of the mysterious calms, waterspouts, and sudden storms that have (34) seafarers in its water.
The triangle has (35) considerable public interest through three (36) books, a television documentary (narrated by horror master Vincent Price) and a special exposition at the Library of Congress. None of these investigations has produced (37) answers to the mystery of the triangle, but there is no (38) of interesting theories. Some scientists and popular authors go (39) suggest that triangle is the (40) ground of extraterrestrial beings in search of human specimens for their "cosmic zoos.\

A．presentation

B．report

C．explanation

D．shortage