Two Asteroids,A and B,orbit the Sun on Circular Orbits with Radii

Multiple Choice

Two asteroids,A and B,orbit the Sun on circular orbits with radii of 1 AU and 4 AU,respectively.How do their orbital velocities compare to each other?

A) Asteroid A has twice the velocity of asteroid B.
B) Asteroid A has four times the velocity of asteroid B.
C) Asteroid A has eight times the velocity of asteroid B.
D) The asteroids have identical velocities.