This is a paragraph-ordering question built from six sentences about employees and self-interested leaders. The fastest way in is to find the sentence that needs no earlier reference to make sense, and then treat words like "they", "these same leaders" and "those they lead" as arrows pointing to the sentence right before them.
Reading them as 1-3-5-6-2-4 leaves no pronoun without a clear match. This was option 5 in the original five-option paper, the official answer, so once the paper is folded to four options it lands as option 4.
Let's summarize:
So 1-3-5-6-2-4, option 4 among the folded choices, is correct.