The correct answer is: B. QPSR
The sentence is about a young man who did exactly what he had been told, and the plan succeeded. The first step in the sequence is for the young man to do exactly what he had been told. The second step is for the plan to succeed. The third step is for the young man to be rewarded beyond his dreams.
Option A, QPRS, is incorrect because the plan succeeds before the young man does exactly what he had been told. Option C, PQSR, is incorrect because the young man is rewarded beyond his dreams before the plan succeeds. Option D, QSRP, is incorrect because the young man does exactly what he had been told before the plan succeeds.