The company's decision to decentralize its operations, a strategy implemented to boost local responsiveness, has been met with mixed results, because it has led to inefficiencies in resource allocation.
Correct: A
The original sentence (Option A) is grammatically sound and idiomatically correct. 'Has been met with mixed results' is a standard and appropriate passive construction, implying that the decision received or encountered these results. The pronoun 'it' clearly refers to 'the company's decision,' which logically 'has led to inefficiencies.' The present perfect tense ('has been met,' 'has led') is appropriate for describing a situation that began in the past (the decision) and whose effects (mixed results, inefficiencies) continue or have current relevance. Other options introduce less precise or less idiomatic phrasing, or grammatical issues: Option B uses 'for boosting' (less idiomatic than 'to boost' for purpose) and 'having led' (a participle phrase that is less direct for causation than 'because it has led'). Option C uses the simple past 'met' and 'led,' which implies the situation is entirely concluded, possibly altering the intended meaning that the results are *still* mixed. Option D changes to active voice 'has met with mixed results,' which is generally acceptable but perhaps less idiomatic for 'results' than 'been met with.' Option E is wordier with 'implemented as a strategy' and uses the less direct 'having led.' Given the choices, the original sentence (A) is the most precise, idiomatic, and grammatically correct.