(For A, they can't have the greater Range, because Range is shown by the Dots at the furthest ends of the lines. For B, tbh I don't actually know what it means by Symmetric(!), and for D, The Median is the middle line in the box plot, which is obviously lower than team b's one.)
6. B (Pretty obvious actually, with the process of elimination. I know it's a bit wordy, but the other statements are basically all saying what's blatantly false, like none of the students liking a temperature of over 65 or under 75, etc.)