Sunspots Are Cooler Than the Surrounding Gas in the Photosphere

Sunspots are cooler than the surrounding gas in the photosphere because

A) they are regions where convection carries cooler material downward.
B) there is less fusion occurring there.
C) magnetic fields lift material from the sunspot and quickly cool the material.
D) strong magnetic fields slow convection and prevent hot plasma from entering the region.
E) magnetic fields trap ionized gases that absorb light.