From "Animal Prisons" Read the sentence.

"Teachers load groups of children on buses for field trips, whisking them off to a day of fun and adventure at the zoo."

Which best describes how the author uses a rhetorical technique in this sentence?
A. Understatement is used to introduce the topic in a neutral way.
B. The description sets a light tone that will later be undermined.
C. Repetition is used to show the importance of the topic for many types of people.
D. Allusion is used to show how common it is for this type of field trip to occur.