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 period 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?

5π seconds
10π seconds
20π seconds
30π seconds (ok for reference i think i figured it out its 30π seconds)