Longstreet Corporation's sales today are $10 million. Sales are expected to grow by $1 million in each of the next 5 years, so that sales in 5 years are expected to be $15 million. What average rate of annual growth does Longstreet expect over the next five years?

(A) 8.70%
(B) 8.96%
(C) 8.45%
(D) 9.23%
(E) 8.20%