<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>
I think undergraduates. I´m going to second guess myself and say alumni. Wait, I talked it over with myself and I think I wrote the right answer first. Lol, hope this helps.
Answer:
Psychological constructs are easy to define and measure
