Sunspots Are Darker Than the Regions of the Sun Around

Sunspots are darker than the regions of the Sun around them because

A) they consist of different elements than the rest of the Sun
B) they are located in the corona and not on the photosphere
C) they move much faster around the Sun than other material and thus heat up
D) they are the shadows of the planets and asteroids seen on the bright surface of the Sun
E) they are cooler than the material around them (although still very hot compared to Earth temperatures)