37. The author refers to the swirling pattern of a hurricane primarily in order to:

  • A. help explain the shortcomings of the plum-andpizza metaphor.

  • B. argue that the unpredictability of the rotation of spiral galaxies requires a new metaphor.

  • C. emphasize the particular aspects of the Milky Way that make it unique.

  • D. describe how the movement of the Milky Way creates gravitational tides.