use the same size of paper. buy the same color of paper. fold the paper the same way. decorate the paper the same way.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A class wanted to see which paper airplane design could fly the farthest. In order to have the most accurate results, every student should
Possibilities:
- use the same size of paper.
- buy the same color of paper.
- fold the paper the same way.
- decorate the paper the same way.

use the same size of paper.