4. Before the present theory of plate tectonics, scientists used the hypothesis of continental drift to propose that Earth's continents are in motion. Which of the following were initially used to support the hypothesis of continental drift? I. the matching shapes of continent edges II. similar fossils on different continents III. matching rock types on different continents IV. evidence in the rock record for climate change II and III only II, III, and IV only I, II, III, and IV I and IV only

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