What was the most balanced effect of post-drift studies on Wegener's theory?

Correct answer: They strengthened the idea with new evidence and better explained mechanism

The direct answer is A: post-drift studies strengthened Wegener’s basic idea with new evidence and explained its mechanism more clearly. Wegener proposed that continents had once been joined and later moved apart, but he could not give a fully convincing force or process for this movement. Later research in oceanography, palaeomagnetism, seafloor spreading and plate tectonics supplied stronger evidence. It also showed how movement could occur through lithospheric plates and processes related to the mantle. Therefore, the later studies did not simply accept every detail of Wegener’s original explanation, nor did they reject continental drift. Option A is correct because it expresses both continuity and improvement. Option B is wrong because Wegener was not proved completely wrong; his central insight became an important part of plate tectonic theory. Option C is wrong because Pangaea received support from matching continents, fossils and rocks. Option D is wrong because oceans became extremely important in studying seafloor spreading, ridges and magnetic patterns. Memory cue: later science often refines an important idea instead of merely accepting or rejecting it.