Sentence Correction (SC) | Re: It was done by meticulously typesetting

It was done by meticulously typesetting manuscripts letter by letter, before the development of digital typesetting, which allows typographers to not only finalize a copy-edited script for publishing but also create page layouts in a virtual setting.

A) It was done by meticulously typesetting manuscripts letter by letter, before the development of digital typesetting
B) Manuscripts had to be meticulously typeset letter by letter before the development of digital typesetting
C) Typographers had