If the Black Hole in the Center of the Milky $1 / 2$

Multiple Choice

If the black hole in the center of the Milky Way Galaxy were 4 *10⁶ solar masses, what would be the orbital period of Earth around this object in an orbit of radius 1 au (assuming that Newtonian physics and Kepler's third law apply) ?

A) less than 1 second
B) 3 minutes
C) 4 $1 / 2$ hours
D) 5 weeks