Select the correct answer. When do sunspots disappear?

A. Sunspots are always present and NEVER disappear.

B. Once the magnetic field weakens in the area and cold plasma enters the area of the sunspot

c.
Once the magnetic field weakens in the area and hotter plasma enters the area of the sunspot

D.
Once the magnetic field strengthens in the area and hotter plasma enters the area of the sunspot