If the code for 'CAT' is 12, 15, 18 and the code for 'DOG' is 14, 17, 20, what is the code for 'BIRD'?
Answer: B. 11, 13, 15, 17
The pattern suggests that each letter is coded by an increasing sequence of numbers. The code for 'BIRD' follows the same pattern as 'CAT' and 'DOG' with an increment of 1 for each letter.