Select all of the true statements about surface currents. A. They form gyres. B. They transport heat across Earth's surface. C. They are known as "thermohaline circulation." D. They are caused by wind

Select all of the true statements about surface currents. A. They form gyres. B. They transport heat across Earth's surface. C. They are known as "thermohaline circulation." D. They are caused by wind and Earth's rotation. E. They are driven by density differences in the water. F. They take hundreds to thousands of years to complete a cycle.