You're asking about Q13 but posting on the thread about Q14.
Here's the link for Q13 ... see if you're appeased by that thread:
https://www.manhattanprep.com/lsat/foru ... t4171.htmlBut, quickly, you said:
"I can see why all other answer choices cannot be correct except B but I am just not 100% assured why B is correct."
Q13 doesn't say that the correct answer choice will be 100% assured. It says the correct answer will be "MOST strongly supported by the information".
You will often have to pick less-than-provable but still very supportable answers on "most strongly support" questions.
Also, the "unrefined gold" in (B) does NOT refer to Senegalese gold. Senegalese gold was "the purest", always 92%, and never refined.
All OTHER types of gold, were thus less than 92%, prior to being refined.