S1: We now know that the oceans are very deep. P: For example, the Indian ocean has a range called the Indian Ridge. Q: Much of it is fairly flat. R: However, there are great mountain ranges as well. S: On average the bottom is 2.5 miles to 3.5 miles down S6: This reaches from the India to the Antarctic. The Proper sequence should be:
Correct answer A. SQPR
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