Detailed Instructions: In this task, you are given a question and a context passage. You have to answer the question based on the given passage.
Q: The Atlantic has?, Context: During the mid-Eocene, it is believed that the drainage basin of the Amazon was split along the middle of the continent by the Purus Arch. Water on the eastern side flowed toward the Atlantic, while to the west water flowed toward the Pacific across the Amazonas Basin. As the Andes Mountains rose, however, a large basin was created that enclosed a lake; now known as the Solimoes Basin. Within the last 510 million years, this accumulating water broke through the Purus Arch, joining the easterly flow toward the Atlantic.
A:
Water