He is using Parallelism, don't let the quiz fool you.
The second one does because snow is singular
Because raising the minimum age to graduation can lead to drop outs and because people just blow through school
No, It does not have a fragment.
<span>The correct answer is A. The river is constantly changing. The author describes the Mississippi as fickle because it is not constant - you can never know when it is going to change, and whether that change will be for the better or for the worse. The word fickle means changeable, volatile, irregular. </span>