Consider the Following String of Numbers: 20, 18, 14, 8

Consider the following string of numbers: 20, 18, 14, 8, 4. Given the average of these numbers, what happens when the number 6 is included?

A) The average falls because 6 is less than 20, the first number in the set.
B) The average does not change because 6 is insignificant.
C) The average rises because 6 is greater than the last number in the set, 4.
D) The average rises because 6 is greater than the previous average.
E) The average falls because 6 is less than the previous average.