raghavakumar85 wrote:
In reference to the current popularity of electronic mail, postal services frequently expressed anxiety that their prospects for remaining profitable are being limited by their antiquated business model.
* (A) In reference to the current popularity of electronic mail, postal services frequently expressed anxiety that
* (B) Referring to the current popularity of electronic mail, postal services frequently expressed anxiety about
* (C) When referring to the current popularity of electronic
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