While writing an apology letter, one should focus primarily on

Correct Answer: (C) rectification of the problem

While drafting an effective official or formal apology letter in administrative communication, the primary focus must be on the rectification of the problem and outlining corrective measures to prevent recurrence. A mere focus on the problem (Option A) or offering compensation (Option B) lacks constructive value, while formatting elements like the font (Option D) are secondary considerations in bureaucratic correspondence.