The average age of eight girls is y years. 5 new girls having ages (in years) given by y + 3, y - 6, y + 15, y + 8, and y + 6, join the class. What is the new average age of the class?

A

(y + 1) years

B

(y + 3) years

C

(y + 6) years

D

(y + 2) years