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In what way was the convectional current theory considered more advanced than Wegener's theory?

Answer and explanation

Correct answer: It suggested not only evidence but also a possible mechanism

The direct answer is Option A. Wegener’s continental-drift theory used evidence such as matching coastlines, similar fossils and related rocks, but it did not satisfactorily explain what force moved the continents. The convectional-current theory was more advanced because it suggested a possible physical mechanism: heat inside Earth could produce convection currents in the mantle, helping drive movement. Option A is therefore correct. Option B is wrong because later theories did not reject fossil evidence; fossils remained important support. Option C is absurd because Earth was not considered flat. Option D is wrong because the theory concerned movement, not fixed oceans. Exam cue: Wegener provided evidence; convection theory tried to explain the driving process.

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MechanismWegenerHolmes

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