Is my reasoning for this question OK? Any help is much appreciated!
Premise: Some researchers criticize government for not releasing UFO info + info requests are brushed aside
Conclusion: Extraterrestrial UFOs have been sighted
The argument jumps from claiming info requests for UFOs are denied to conclude the the UFOs are in fact extraterrestrial. (They could be terrestrial; maybe the government is building its own spaceships?). To strengthen this argument, I need a choice that bridges this gap; something that is along the lines of: if the requests are ignored, then the UFOs are definitely alien. This is answer choice (B): government would withhold info about UFOs only if the UFOs were from other planets.
Incorrect Choices
(A) weakens -- if the government generally doesn't give access to any secure information then this would be an alternative reason for the government not allowing access to information about UFOs; it is because the information is secure and not because the UFOs are alien.
(C) out of scope -- I initially chose this one, but on a second read I realized this choice has nothing to do with the conclusion.
(D) out of scope -- this comparison between researchers does not relate to the argument
(E) out of scope -- the argument is not about what the government has always done with UFOs since the stimulus already clearly states that researchers have criticized the government for not releasing enough info.