C) to make Gregor seem less connected to his parents
Explanation:
In the original, the names of Gregor's parents are barely mentioned. So, by choosing to call them "The Mother" and "The Father", the translator actually made Gregor and his parents seem to be even more apart.
True, chronologically means in order, and example of something not chronological is usage of a ringing clock bell in the roman era. For it didn't exist then. (a sun dial did... but nothing to notify hour change with sound)