Since the Earth's crust is much thicker under the continents, equipment would have to be capable of drilling through 100,000 feet of rock to investigate the mantle ______.

A beneath them

B beneath their

C beneath its

D beneath they

Solution

Correct Answer: Option A

-preposition-এর পরে pronoun-এর object form use হবে।
-এখানে beneath হলো preposition।
-এজন্য beneath-এর পর them ব্যবহৃত হবে।

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