The frozen, well-preserved body of a man was recently discovered in a glacier as the glacier melted. Artifacts found on the body reveal that the man lived at least 4, 000 years ago. The nature of the glacier indicates that the man died on virtually the same spot where his body was discovered. If the body had not been sealed in the glacier shortly after the man died, or if the body had thawed in the intervening millennia, it would not still be preserved. Which one of the following is most strongly supported if all of the statements above are true? ['The man whose body was discovered in the glacier did not freeze to death.', 'The artifacts found on the frozen body would not have been preserved if they had not also been frozen.', 'The glacier that melted to reveal the ancient is at least 4, 000 years old.', 'None of the artifacts found on the body were more than 4, 000 years old.']