Recently ApexCo has begun drilling off the coast of Mycondia. In this time, the number of animals that end up on the beach, coated in oil and other industrial by-products, has increased dramatically. Nonetheless, no Peterson's loggerhead turtles, a tortoise common in the waters off the coast of Mycondia, have washed upon shore. ApexCo's public relations claim that while some of the by-products are clearly harmful to aquatic life, the lack of Peterson's loggerhead turtles that are washed ashore suggest that not all the aquatic life there is adversely affected. Which of the following, if true, casts the most doubt on the argument employed by ApexCo's public relations firm? ['ApexCo has also drilled off the coast of Sylvania, which witnessed many of its local aquatic life washing ashore.', "The Peterson's loggerhead turtle has never been seen washed upon the shores of Mycondia.", 'Sea otters are the most common beached animals, followed by dolphins.', 'There have been no reports of beached cephalopods, which are common in the waters of the coast of Mycondia.']