GMAT Sentence Correction (SC) | Re: The results of the company's cost-cutting measures are

I chose the correct answer (C) solely based on the use of "V-ing" after "after". Since two verbs (increase and fall) clarify the same subject "profits" --> if "after" is used, it should be followed by "V-ing" form of the verb denoting the prior action (which is "fall" in this sentence).

E.g. After discussing all other issues with Lana, I have changed my mind.

However, I'm not sure if I can rely on this reason to pick up the correct
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