The following diagrams are supposed to represent the solar system, with the Sun in the center and two planets orbiting it. The left diagram is a diagram without dark matter, while the right diagram shows the solar system embedded in a huge cloud of dark matter that is much much bigger than the solar system.

    A ) The force of gravity on star C is greater than the force of gravity on star D because it is closer to the Sun, and dark matter has no effect.
    B) The force of gravity on star D is greater than the force of gravity on star C because more dark matter is pulling on it.
    C) The force of gravity on star D is greater than the force of gravity on star C because more dark matter is pulling on it.
    D) The force of gravity is the same on stars C and D because it's the same Sun pulling on both of them.

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