If the code for 'CAT' is 12, 15, 18 and the code for 'DOG' is 14, 16, 20, what is the code for 'BIRD'?
Answer: B. 11, 13, 15, 17
The pattern suggests that each letter is coded by adding 2 to the previous letter's code. Following this pattern, 'BIRD' would be coded as 11, 13, 15, 17.