Heat stroke can kill or cause damage to the brain and other internal organs, and is most likely to effect someone doing an activity like, Working out, playing soccer, playing basketball.
Hopefully this could help :)
The respond that I'll give to her is something that will lighten up her mood and in a way that will make her believe that there is something more than just her belief of giving up. I'll also explain to her that the thing that she has heard of isn't the only information that is known of for MS has different clinical courses and the information that she has is lacking for there are more to it.
I beleive it is A. the others sound like they're too much