Mysterious ancient tracks cut into limestone have recently been found on the island of Malta. The tracks wander, sometimes disappearing under modem structures. Their origin and purpose are unknown, but evidence indicates that they could have connected settlements or water sources. One archaeologist hypothesizes, based on the tracks' physical appearance and surroundings, that they were made in about 1000 B. C. by animal-drawn carts. Which one of the following, if true, most helps to support the archaeologist's hypothesis mentioned above? ['Some of the tracks connect areas that are sources of fresh water on Malta today.', 'Some terrain on the island of Malta is more easily traversed on foot than are certain other types of terrain there.', 'Historically, inhabitants of the island of Malta have not been innovative users of transportation technology.', 'Areas near the tracks have yielded relatively large amounts of fossilized animal excrement dating from approximately 1000 B. C.']