The Element Helium Was Discovered (Through Spectroscopy) in the Atmosphere

Multiple Choice

The element helium was discovered (through spectroscopy) in the atmosphere of the Sun before it was discovered in trace amounts on Earth. This was possible because:

A) helium is the simplest element in its atomic structure.
B) the helium on Earth ultimately came from the Sun; thus we know the structure of solar helium must be the same as that of terrestrial helium.
C) all helium atoms in the universe are believed to be fundamentally the same.
D) both Earth and the Sun sweep up helium in their motion through space, so it is not surprising that the helium discovered on the Sun was the same as terrestrial helium.