The image below shows a segment of the surface of Jupiter's moon Callisto. Why are portions of the surface dark? Why are some craters dark and some white? What does this image tell you about the history of Callisto?a. Callisto is a mixture of rock and ice; dark surfaces are rocky and ice-free. Dark craters formed after meteorite impacts and white craters are vents of icy volcanoes. The surface of Callisto is rather old.b. The surface has been modified by the sunlight; also dust particles have accumulated on it. Dark craters are old, while white craters are young and expose fresh white ice. The surface of Callisto is rather old.c. Callisto is a mixture of rock and ice; dark surfaces are rocky and ice-free. Dark craters are old, while white craters are young and expose fresh white ice. Callisto has been geologically active.d. The surface has been modified by sunlight; also dust particles have accumulated on it. Dark craters formed after meteorite impacts and white craters are vents of active volcanoes. Callisto has been geologically active.

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