Sentence Correction (SC) | Re: Cost cutting and restructuring has allowed the manufacturing company

I got to the correct answer, but isn't "as well as forecasting" okay in (E)?

I thought "as well as" allows flexibility when it comes to parallelism. Relevant OG question below:

https://gmatclub.com/forum/diesel-engin ... 85984.html

"Diesel engines burn as much as 30% less fuel than gasoline engines of comparable
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