单项选择题

Around 1975 a number of books were written about strange occurrences in the Bermuda Triangle, a part of the Atlantic Ocean off the southeast coast off the U.S. They told the stories of planes and ships that disappeared for no understandable reason and were never found again. They told about ships which were found undamaged but with no one on them. According to the books, more than 1,000 people disappeared in the Triangle from 1945 to 1975.
According to some writers, there were no natural explanations for many of the disappearances, so they suggested other explanations. For example, according to the writer, some strange and terrible power exists in the Triangle. According to another writer, people from space are living at the bottom of the Atlantic, and sometimes they need human sailors and airmen for their research. These ideas were not scientific, but they were good advertisements. The books about the Bermuda Triangle were immediate successes.
However, the books give little evidence to support their unusual ideas. In addition, they ignore at least three important facts that suggest natural reasons for many of the occurrences. First, messages from some of the ships and aircraft which later disappeared give us evidence of problems with navigational instruments. Similar stories are told by officers who were on duty on planes and ships which finally managed to come through the Triangle without disaster. Second, the weather in this part of the Atlantic Ocean is very unpredictable. Dangerous storms that can cause problems even for experienced pilots and sailors can begin suddenly and without warning. Finally, the Bermuda Triangle is very large, and many people, both experienced and inexperienced, sail and fly through it. Perhaps the figure of 1,000 deaths in thirty years shocks some people, but, in fact, the figure is not unusual for an area of ocean that is so large and that is crossed by so many ships.
The evidence which exists, therefore, supports one conclusion about Bermuda Triangle: We do not need stories about people from space or strange unnatural powers to explain the disappearances.

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