Which of the following statements is true about the theory of plate tectonics and the theory of continental drift? a. the theory of plate tectonics explains how continental movements could occur. b. the theory of plate tectonics shows that continental movements could not have happened. c. the theory of plate tectonics tells us exactly where the continents were before pangaea divided. d. the theory of plate tectonics shows that pangaea was impossible, but the continents did move.