How to strengthen an argument?

[manhhiep2509]

I have thought that there are two (maybe three) ways to strengthen an argument in general:
(1) find information to reinforce the premise
(2) explicate an assumption
(3) find information make the conclusion sound but not that mentioned in (1) and (2) (I am not sure about this approach)

However, in question 32 Verbal review 2, I see that (1) does not work - choice C does not strengthen the conclusion.
I know that if a choice only states almost all information that is mentioned in stimulus, the choice cannot strengthen the conclusion at all. But the choice C makes information more believable. After all, what C reinforce is a finding of a study.
So, is it true that (1) does not work or
the question is unique and we cannot apply (1) in this case?

Thank you.

[RonPurewal]

In the problem you're talking about, the correct answer does provide new information.

The original passage mentions that, recently, an unusually large number of things have gone wrong -- but doesn't say why. It just says that there was "a recent spate of ... mishaps". Those could be due to increased performance demands -- but they could also be due to a random act of God.

Then, the passage stops at the idea that people will demand greater performance from the satellites. It doesn't connect that idea to a greater frequency of breakdowns.
That connection -- the idea that the greater performance demands will cause more breakdowns -- is not there until you have choice C.

[manhhiep2509]

Sorry Ron because I wasted your time. I mentioned the wrong name of the problem. The problem I want to discuss is the question 33 in review verbal 2.

This is the first sentence in its stimulus:
"Art restorers who have been studying the factors that cause Renaissance oil paintings to deteriorate physically..."

I appreciate your help.

[RonPurewal]

You can't "reinforce" facts. If something is a fact, then it's a fact, and "supporting information" is irrelevant.

E.g., my foot is 12.5 inches long. This is a fact.
Something like "Many photos of Ron's foot show that it is slightly longer than a 12-inch ruler" would not "reinforce" that idea, since it's already a fact.
Same thing with "Researchers have actually found that xxxx" in this passage. If you have found that something is true, then it's a fact.

If an argument contained a claim that was actually in doubt, then "reinforcement" could be a thing.

As usual in CR, this is all stuff you already know (and have known since you were a fairly small child). When it comes to questions like this, just use your real-world common sense, and 99% of the issues will resolve themselves.