Answer:
A semicolon can be used to combine two closely related independent clauses if they are not already joined by a coordinating conjunction (and, but, or, nor, for, so, or yet).
B - Down. Just try and see if it makes sense to be in the sentence
Answer:
A) temper; plot
Explanation:
The first half focuses about neutralizing or moderating thoughts and rhetoric of revolutionaries which corresponds to the definition of the term "temper". This runs in contrast with the concept of going against the government requiring planning, plotting or forming hidden schemes. This is connected to the term "plot".