Scientists have discovered that rifting at the bottom of the ocean has never stopped. This discovery may answer a question that has caused people's attention. The time of the earth is extended by 1/700 seconds per day compared with the previous day, that is, each day passes by 0.5. Second, according to this prediction, in another 200 million years, there will be only 250 days in a year. What is the most accurate answer to "a question that has caused people's attention"? ["The rift in the bottom of the ocean expands and the Earth's running time is extended.", "Fissures at the bottom of the ocean extend, shortening Earth's operating time.", "The rift in the bottom of the ocean expands and the Earth's rotation slows down.", "The rift at the bottom of the ocean expands, and the earth's rotation speeds up."]