The answer would be C) Samuel Johnson
The Roman Emperor, Constantine
The Roman Emperor conversion to Christianity helped to make it acceptable in Rome. As a result, Christianity played a big role in the unification of Rome as a single Christian society as the Christian church and faith grew
One impact of the printing press was a general increase in literacy and education. This was because books suddenly became cheaper - until then they had to be hand-written, and so the monopoly on knowledge was generally in the hands of the church, who was responsible for re-writing books.
One indirect impact was the decrease of the power of the church, who no longer had the monopoly on knowledge.