Step 1: Identify the opening sentence
Sentence (A) introduces a person who overcame hardship—sets up a background.
Step 2: Establish the turning point
Sentence (C) introduces the martial arts coach who rescued the situation—this is the “turning point”.
Step 3: Detail the controversy
Sentence (D) (court case) is the final consequence of the issue arising in sentence (B), where government objects to the mentoring process.
Correct order: A \( \rightarrow \) C \( \rightarrow \) B \( \rightarrow \) D
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: