This is a ranking question, so instead of jumping to the given orderings, first score each of the four interventions on its own against the real problem in the caselet: night shift supervisors, especially Ram Lal, never got the same one-on-one wage talks as the day shift supervisors, and had no way to reach Mr. Thakur before their contracts were finalised.
Ranking from most to least impact gives 2, 3, 1, 4. Checking the given orderings, this matches the option that lists 2, 3, 1, 4 in exactly that sequence.
Let's summarize:
So the decreasing order of organisational impact is 2, 3, 1, 4.