The statement is most appropriate for Blank 2 as it further elucidates the concept of 'productive dualism' previously introduced. It offers supplementary insights into the differentiation between the "modern" and "traditional" sectors within the economies of impoverished nations, emphasizing the historical viewpoint that contrasts developing and developed countries. This sentence lays the groundwork for the ensuing discourse regarding the significance of this differentiation in the contemporary scenario.
So, the correct option is (B): Option 2
For any natural number $k$, let $a_k = 3^k$. The smallest natural number $m$ for which \[ (a_1)^1 \times (a_2)^2 \times \dots \times (a_{20})^{20} \;<\; a_{21} \times a_{22} \times \dots \times a_{20+m} \] is: