Hannah constructed two similar circles as seen in the image below. If the length of the smaller circle is 5/3 pi, which of the following would be true?
A. The arc length of the smaller circle is double the arc length of the larger circle.
B. The arc length of the larger circle is proportional to the radius of the larger circle.
C. The arc length of the larger circle is equal to half the arc length of the smaller circle.
D. The arc length of the larger circle is proportional to the central angle of the arc of the smaller circle.