Which statement describes the solar feature labeled B?

Image of the sun with three solar properties labeled by A, B, and C. Label A points to lit particles shooting outward from and then coming back towards the sun's surface. Label B points to a region on the sun's surface that is bright. Label C points to the a layer of the sun's atmosphere.

An envelope of plasma surrounding the sun
A stream of glowing gas that shoots out from the sun in an arch
A brief eruption of intense high-energy radiation from the sun's surface
A dark spot appearing from time to time on the sun's surface