Answer: Bev is jealous of Millicent
Step-by-step explanation:
The conclusion that is best supported by the passage is that Bev is jealous of Millicent.
From the passage, it was stated that Bev Bev was very cross about the fact that Millicent was talking with Herb Dalton at lunch. Even though Millicent said that she didn't, Bev said she saw that Millicent was smiling at him and told her not to do it again. Therefore, Bev is jealous of Millicent.