While taking a PSAT practice test, I was told by the answer key that the underlined sentence below is grammatically correct and does not need to be changed.
In my experience "reasons," when used in this context, is usually followed by the phrase "as to why bees are vanishing" "for why it is that bees are vanishing," or "for the vanishing of bees." Will simply a "that" suffice here or is my answer key incorrect?
Thank you!