Which Moons Are Sometimes Called the Galilean Moons

Multiple Choice

Which moons are sometimes called the Galilean moons?

A) the moons that orbit their planet "backward" compared to their planet's rotation, such as Neptune's moon Triton
B) the moons orbiting Uranus, which was once named "planet Galileo"
C) the four largest moons of Jupiter: Io, Europa, Ganymede, and Callisto
D) the two largest moons in the solar system: Ganymede and Titan