The distance from the ground, in meters, of a person riding on a Ferris wheel after t seconds can be modeled by the function D of t is equal to 10 times sine of the quantity t over 20 end quantity plus 10. Based on the graph of the function that represents the rider's distance from the ground, how long will it take before the rider is at the lowest point on the Ferris wheel?Group of answer choices:  20π seconds 5π seconds 30π seconds 10π seconds