Answer:
I don't know why politics and certain opinions are being forced on you in what is presumably English class, but the answer would be A, the idea that the mob was encouraged by false statements.
Step-by-step explanation:
This is because it is widely believed that Trump encouraged the mob, with supposedly false statements, and that is what this sentence is conveying, with the use of the word "fomenting", which means to 'instigate or stir up'
- example: "they accused him of fomenting political unrest"