Final answer:
The correct answer to complete the sequence is 20C, determined by a pattern where the numeric value decreases by 3 and the alphabetical position of the letter also decreases by 3.
Step-by-step explanation:
The sequence given in the question appears to be a pattern of decreasing numbers and alphabet letters. Upon examining the pattern:
32F, 29L, 26I, 23F, ?
we see that the numbers decrease by 3 each time, and the letters are not in a simple alphabetical order. However, noting the positions of the letters in the alphabet (F=6, L=12, I=9), we see that the numbers and letter positions both decrease by 3. Following this pattern, the next number will be 23 - 3 = 20. The next letter should occupy the position of F's with 3 subtracted, which is 6 - 3 = 3, which corresponds to the letter 'C'.
Therefore, the correct answer is 20C.