Which correctly shows where a colon is needed in the sentence?
A. Apollo astronauts took additional classes astronomy, Earth geology, life sciences: and geology of the Moon.
B. Apollo astronauts took additional classes astronomy: Earth geology, life sciences, and geology of the Moon.
C. Apollo astronauts took additional classes: astronomy, Earth geology, life sciences, and geology of the Moon.
D. Apollo astronauts took: additional classes astronomy, Earth geology, life sciences, and geology of the Moon.