Answer:
same thing as before cuz points lol
D.
Explanation:
If she were to use a different type of paper she'd then be testing two variables instead of just the one (what affect does different plane shapes have on the distance)
Neuron.
*Tip* Try googling the question. You'll be surprised.
The first thing Fiona, or anyone, should do is form her hypothesis.
The hypothesis is your own proposed explanation for whatever phenomenon you're trying to study. Think of it as a predetermined idea of what could happen based on what you already know.