Which of the Following Was NOT Done by Galileo Galilei

Multiple Choice

Which of the following was NOT done by Galileo Galilei?

A) turning the telescope to the sky and believing what it showed his eyes
B) discovering four large moons around Jupiter
C) discovering that Venus goes through phases (like the Moon)
D) resolving the Milky Way into many, many stars
E) explaining retrograde motion with the heliocentric hypothesis