An H II Region Looks Red, Just as the Metal

An H II region looks red, just as the metal filaments in a toaster glow red when heated. Are these colors produced in the same way?

A) Yes, both come from the blackbody spectrum, described by Wien's law and the law of Stefan and Boltzmann.
B) Not exactly, the metal spectrum peaks in the infrared, but there is enough spillover into the visible to make the object look red. The H II region's blackbody curve actually peaks in the red.
C) No, the metal's red is produced by a blackbody curve. The H II region glows red because of a specific emission line in hydrogen.
D) No, the H II region's red is produced by a blackbody curve. The metal glows red because of a specific emission line in iron.