I had the same confusion but I followed the following logic:

The reporter is saying /athlete's foot cured --> /M which is the same as M --> athlete's foot cured.

Answer choice A is saying that the reporter makes the wrong interpretation of saying that "M always cures athlete's foot" from what the scientist said.

"Always" is the indicator so anything after that is the necessary condition. So in lawgic, you get M --> cure athlete's foot which is what we got initially in the reading. The scientist, on the other hand, is saying that "the only people who whose athlete's foot was cured had been given medication M." The indicator phrase is "the only" which is part of sufficient condition [Group 1]. So the scientist is saying athlete's foot cured --> M. The reporter flipped these around. Hope that makes sense!

For question 2 [the first sentence], how do we know which indicator to focus on? The sentence is: Joffrey must kill Bran or Robb. It includes the indicators must and or. How do I properly tackle these sentences?

yes, all you have to do is reload the page and it should work. if that does not work, you can also pause the video [and if it goes blank again], just use your mouse to click back a few seconds and the text should appear again while still being paused.