Why is each day on Earth 24 hours long?
A.
It takes Earth 24 hours to make a complete rotation on its axis.
B.
It takes the Sun 24 hours to make a complete rotation on its axis.
C.
It takes Earth 24 hours to make a complete revolution around the Sun.
D.
It takes the Sun 24 hours to make a complete revolution around Earth.
A.
It takes Earth 24 hours to make a complete rotation on its axis.