I've been working on a lot of strengthen the argument questions (using the Economist's online course), and I'm finding that a lot of the correct answers focus on supporting/stating a key unstated assumption in the argument. I understand that while this is one important way to strengthen an argument, you may also strengthen an argument by:
-Adding an additional premise (that may not be necessary, but supports the argument)
-Strengthening the conclusion
-Refuting a claim that weakens the argument
Should my first order of business always be to look out for answer choices that state un-stated asssumptions? Alternatively, does anyone have an idea of the relative likelihood that one of these other methods of strengthening an argument would be the correct answer choice?
Thanks in advance!