In literature, a symbol in a story or something is an object or person or event with a meaning different from its literal meaning. id go with symbol.
I also think that they answer is b.
Answer:
metaphor
Explanation:
A metaphor is a figure of speech that, for rhetorical effect, directly refers to one thing by mentioning another. The author is directly referring to the public as swine by using the word "are". The author is also directly referring to advertising as the rattling of a stick inside a swill-bucket, by using the word "is"
Explanation:
The author´s primary purpose is to compel readers or audiences to take action, convince them an idea through an argument, or to confirm their belief´s.
