My son, Johnny, opened a new restaurant, and on the opening day I helped out in the kitche

n. By mid-morning, I noticed that the cakes we had ordered hadn't come. Johnny and I decided not to tell it to anyone else, hoping that the cakes would arrive soon.

They still hadn't come when, just before noon, a man eating in our restaurant wanted a cake. I suggested that I run to the bakery next door to get some, and Johnny readily agreed. Going out of our back door, I knocked on the back door of the bakery and bought a few from the baker's helper. That cake was the only one we sold all day.

After closing, Johnny and I sat discussing things with my daughter, who had been out from serving. "An interesting thing happened just before noon," she said. "The owner of the bakery next door came in and ordered a cake of ours. She wanted to compare it with hers."

We know from the passage that ______.

A．the baker next door came to help with the opening

B．the new restaurant did not prepare all its foods

C．the son and the daughter served at the tables

D．the customers enjoyed the cakes very much