Question

These are the heights of Natasha and her four friends:
5 feet, 2 inches; 5 feet, 3 inches; 5 feet, 7 inches; 5 feet, 9 inches; 6 feet, 0 inches

In which situation would the mean of the heights go up the most? Select one of the options below as your answer:
A. You add 2 friends that are 5 feet, 8 inches.
B. You add 1 friend that is 6 feet, 5 inches and 1 friend that is 5 feet, 3 inches.
C. You add 1 friend that is 5 feet, 10 inches.
D. You add 4 friends that are 5 feet, 9 inches.