The Sun's Chromosphere and Corona Were Discovered

The Sun's chromosphere and corona were discovered

A) using the first telescopes Galileo built
B) in the late 19th century through the use of a spectrograph
C) during total eclipses of the Sun
D) using spacecraft that orbited Venus, a planet with a better view of the Sun
E) by ancient shepherds, who saw reflections of the Sun in quiet pools of water