Directions: Select the letter that logically continues the given alphabetical sequence.

C, F, I, L, ?

The correct option is O.

To determine the next letter in the sequence, let us look at the position of each letter in the standard English alphabet:

C is the 3rd letter.
F is the 6th letter.
I is the 9th letter.
L is the 12th letter.

By analyzing the pattern in the position numbers (3, 6, 9, 12), we see that each letter advances by 3 positions in the alphabet:

3 + 3 = 6 (F)
6 + 3 = 9 (I)
9 + 3 = 12 (L)
12 + 3 = 15

The 15th letter of the English alphabet is O.

Therefore, the letter that logically continues the sequence is O.