If 9 January 2013 was Wednesday, what day was it 391 days before?

Correct answer: Option C — Thursday. 391 = 55 complete weeks + 6 days. Moving before by 6 day(s) from Wednesday gives Thursday. Option A (Friday) is rejected because it does not equal the computed result; it represents a counting, direction, leap-year, interval, or hand-motion error. Option B (Saturday) is rejected because it does not equal the computed result; it represents a counting, direction, leap-year, interval, or hand-motion error. Option D (Monday) is rejected because it does not equal the computed result; it represents a counting, direction, leap-year, interval, or hand-motion error.