The department store realizes that customers are having trouble finding what they want and hi people. They see that the checkout rate increases to 100 customers going through the checkouts every ℎ average number of customers remains the same. Which of the following is TRUE about the new average time customers spend at the mall?

a. the time reduces by 40%
b. the time stays the same
c. the time increases by 40%
d. the time reduces by 70%