Both sentences A and D talk about the “weight of the glaciers”. Sentence D tells us that this weight has pushed against the Earth’s surface, causing it to depress and sentence A tells us that thanks to this weight being lifted, due to the melting of the glaciers, the surface is bounding back. Now, we see that sentence B relates to the idea of the surface springing back. It tells us that mountain ranges such as the Alps have experienced a gradual “growth spurt” over the last century. When placed in the order BDA, these sentences make a cogent paragraph. Sentence C talks about glaciers “sculpting mountains” by carving out valleys and carrying away rock debris. This does not relate to the other sentences, which talk of the growth or rebounding of mountains due to the melting of glaciers. So this is the sentence to be eliminated. Correct Answer: Choice (c)
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