In the following questions, a sentence is given with a phrase highlighted in bold. The given phrase in bold may contain an error. The options following can replace the incorrect phrase to make the sentence grammatically correct and contextually meaningful. The correct phrase that is to be replaced will be your answer. If the sentence is correct as it is, then select 'No improvement required' as the answer.  Having been consistently overlooked for a well-deserved promotion over the past three years, the decision was finally made by the senior analyst to resign and seek lucrative opportunities elsewhere.  

This question targets a dangling modifier error. The introductory participial phrase, "Having been consistently overlooked for a well-deserved promotion...", describes an action that happened to a specific person. Grammatically, the subject of the main clause that immediately follows the comma must be the person whom this phrase modifies.  In the original sentence, the subject is "the decision," which implies the decision was overlooked for a promotion, making it illogical.  Option (a) correctly places "the senior analyst" as the subject of the main clause, making it clear who was overlooked and who made the decision. Options (b) and (c) place "it" and "resigning" as the subjects, which do not fix the dangling modifier. Option (d) makes "the senior analyst's decision" the subject, which is also incorrect.