Which option fits best in the following question?
The movement's ideas are not merely absurd; they are __________ dangerous.
Some of the options can have more than one meaning, so I list the most possible meanings below:
formally: Officially (= in an official way)
perfectly: In a manner or way that could not be better (also: used for emphasis, especially in order to assert something that has been challenged or doubted)
absolutely: totally (also: used to emphasize a strong or exaggerated statement)
positively: with certainty (also: used to emphasize that something is the case, even though it may seem surprising)
The first option, formally, is out of picture because the official opinion doesn't necessarily have any relevance to the nature of the movement's ideas. We have to decide between the remaining three options.
There are two sentences:
1 The movement's ideas are not merely absurd;
2 they are __________ dangerous.
In the speaker's mind it's not enough to say that the movements ideas are merely absurd. Something stronger is needed. So they continue: they are dangerous, and for emphasis, they add an emphasizing adverb too: they are .... dangerous. You can see from the Oxford Dictionary definitions that all the options b, c, and d can be used for emphasis.
My question is: which emphasis fits the context of this question the best?