Which of the Following Analogies Best Describes How the Structure

Multiple Choice

Which of the following analogies best describes how the structure of the galaxy's spiral arms is maintained?

A) Like military jets flying in formation above a football stadium,the stars in the spiral arms keep a spiral-shaped formation as they orbit the galaxy.
B) Like cars slowing in traffic to look at an accident,stars slow as they pass through the spiral arms.
C) Like a coiling rope,the spiral arms wind up tighter with every galactic rotation.
D) Like the fins of a giant pinwheel toy,the spiral arms carry a set of bright stars around as they sweep through the galaxy.