The correct answer is: B. thoroughly
A reactionary is someone who opposes change and wants to keep things the way they are. The word “out and out” means “completely” or “utterly.” So, to say that someone is “out and out a reactionary” means that they are completely opposed to change and want to keep things the way they are.
The other options are not correct because they do not accurately describe what a reactionary is. Option A, “no more,” does not make sense in the context of the question. Option C, “in favor of,” is the opposite of what a reactionary is. Option D, “deadly against,” is too extreme and does not accurately reflect the views of most reactionaries.
In conclusion, the correct answer to the question “He is out and out a reactionary. A. no more B. thoroughly C. in favor of D. deadly against” is B. thoroughly.