I believe the answer is D
You know that the sum of a and b is 24, because the average is the sum of the numbers divided by the amount of numbers added together, and 12*2 is 24. Add 3 to 24 so you have 27, and then divide that by 3 because there are now 3 numbers in the set. The average of a, b, and c is 9.
Answer:
Answer of letter A.The narrator is able to justify his failures with theirs.
Explanation:
Because the narrator is suggesting they are responsible for the state of science
