Final answer:
To find the circumference of circle B, we need to know the radius or diameter of the circle. The arc length of AC cannot be used to directly determine the circumference.
Step-by-step explanation:
To find the circumference of circle B, we need to know the radius or diameter of the circle. Without that information, we cannot calculate the circumference. The arc length of AC, which is 10 centimeters, cannot be used to directly determine the circumference of circle B.