Four friends, A, B, C, and D, are sitting in a row. A is to the left of B but to the right of C. D is sitting at one of the ends. What is the correct sequence from left to right?
Answer: A. C, A, B, D
C must be to the left of A, and A must be to the left of B. D is at one end, making the sequence C, A, B, D correct.