I would recommend remembering what your goals are and what the problem is when facing these questions. If you have to strengthen and weaken there is a gap in your argument, that is your saving grace. You need to have a clear conceptual understanding of your gap and then use that to compare the 2 remaining choices. Which better covers or exposes that gap depending on if you are weakening or strengthening. Another point I’d stress is to trust your gut, don’t carry on losing time when you are stuck between two. There are other questions where you are potentially losing points from wasted time trying to hash out what is best or perfect. So use that latter point to avoid looking for perfection, perfection = lost points. Hopefully that helps. Good luck keep grinding