Questions 8 to 10 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now listen to the conversation. A lot of other people find jobs through ______.

A．A dog needs to be small to be fond of joke.
B．It is better to let a dog know that he is funny.
C．Some dogs have a sense of humor while others haven’t.
D．The merits of dogs outweigh their faults.

A．eliminate price errors
B．give itemized printout to the customer
C．save time in the checkout lane and help control inventory
D．all of the above