Steve Burton recently sold the bookstore he inherited from his mother because his income had fallen three years in a row. The new owner installed a coffee machine, redecorated the children's corner, chats with her customers, and remembers their preferences. She reports a 43 percent increase in sales over Steve's last year. The change is most likely due to
A. more advertising.
B. beginner's luck.
C. the owner's personality.
D. a general upswing in the retail book business.