Discussion

Explanation:

The answer is directly supported by “The student of human history can draw on many more natural experiments than …. the five inhabited continents. Comparisons can also utilize large islands ….. as well as societies on hundred of smaller islands and regional societies within each of the continents”. The implication is expressed in option 3.
Option 1 is false in “not conducting…” – this is not true in the context of the passage, nor is the author implying it.
Option 2 is false – the passage nowhere says that large islands provide ‘great’ opportunities for natural experiments” – they are one of the opportunities among many.
The problem faced by historians is not ‘unique’ as stated in option 4. The passage explicitly states that it is faced by several other studies mentioned in the first sentence itself.
There is no data in the passage (even by implication) about cultural anthropologists. Hence, option (e) too is eliminated.
Hence, the correct answer is option 3.

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