The area inside a track can be divided into a rectangle and two semicircles, as shown below. What is the area bounded by the track? (Note: The figure is not necessarily drawn to scale.)

A) 2,000 square yards
B) 2,100 square yards
C) 2,000 + 100π square yards
D) 2,000 + 400π square yards

Please explain how this question is solved, thank you to whoever helps out!