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Read the text and answer the question by selecting all the correct responses. More than one response is correct.

Hills and mountains are typically regarded as the epitome of permanence, successfully resisting the destructive forces of nature, but in fact, they tend to be relatively short-lived in geological terms. As a general rule, the higher a mountain is, the more recently it was formed; for instance, the high mountains of the Himalayas are only about 60 million years old. Lower mountains tend to be older, and are typically the eroded relics of much higher mountain chains. About 500 million years ago, when the present-day continents of North America and Europe were joined, the Caledonian mountain chain was the same size as the modern Himalayas. Today, however, the relics of the Caledonian orogeny (mountain-building period) exist because of the comparatively low mountains of Greenland, the northern Appalachians in the United States, the Scottish Highlands, and the Norwegian coastal plateau.

Q. Which of the following can be inferred from the paragraph about the mountains of the Himalayas?

(A) Their current height is not an indication of their age.
(B) At present, they are much higher than the mountains of the Caledonian range.
(C) They did not exist 400 million years ago.
(D) They are not as high as the Caledonian mountains were 400 million years ago

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