I did not choose A (the correct answer) in this question because I thought "specific examples" was incorrect given the fact that the passage did not raise any plural nouns and actually seemed quite general to describe their examples. ...
... !! We write out the 8 hour time slots we have Saturday ... 2), I get 1 floating hour (floater), and "us time" has ... time is a floating 2 hour block and if I study ...