Two Asteroids,A and B,orbit the Sun

Multiple Choice

Two asteroids,A and B,orbit the Sun.Asteroid A follows a circular orbit with a radius of 6 AU.
Asteroid B follows an elliptical orbit with a perihelion distance of 4 AU and an aphelion distance of 8 AU.
How do their orbital periods compare to each other?

A) Asteroid B has about half the period of asteroid A.
B) Asteroid B has about 1.5 times the period of asteroid A.
C) Asteroid B has about twice the period of asteroid A.
D) The asteroids have identical periods.