17. On which of the following points does the author contradict himself elsewhere in the passage?

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

The method of asking this question is also quite interesting. Where is the author contradicting himself? Lines 83-84 say that the only evidence that ice-trade once prospered is water itself; and lines 60-61 say that evidence disappeared, so it is self-contradictory.