If the code for 'CAT' is 12, 15, 18 and the code for 'DOG' is 14, 17, 20, what is the code for 'BAD'?

Answer: C. 9, 11, 13
The letters B, A, D correspond to the numbers 2, 1, 4, which can be coded as 9, 11, 13 based on the pattern established in the previous codes.