The Gas in the Interstellar Space Between Stars Is Very

The gas in the interstellar space between stars is very tenuous (thin) but can be heated to a very high temperature in the vicinity of a hot star. This hot, tenuous gas will emit

A) light at certain wavelengths only (spectral lines) , the wavelength of a given spectral line depending on the gas temperature.
B) light at certain wavelengths only (spectral lines) , the wavelength of the lines being independent of gas temperature.
C) light at all wavelengths, the continuous spectrum peaking at a certain wavelength or color depending on temperature.
D) no light at any wavelength because hot thin gases do not emit light.