In Comparing the Fraunhofer Lines with Light Emitted by Elements

In comparing the Fraunhofer lines with light emitted by elements in a flame, Bunsen and Kirchhoff demonstrated that __________

A) atoms emit and absorb electromagnetic radiation at characteristic wavelengths.
B) the solar spectrum has dark lines.
C) helium may be found in minerals that contain uranium.
D) electrons are responsible for the absorption and emission of electromagnetic radiation.
E) the solar spectrum has bright lines.