a list of each type of rod used a sketch of each rod before testing a table showing how much each rod weighed a bar graph showing how much each rod bent
I gave my students this multiple choice question: Four rods of equal thickness but made of different metals were tested with equal amounts of weight to see which was most flexible. Which of the following is the best way to report the results of this experiment?

Only one answer is correct among these 4 choices:
- a list of each type of rod used
- a sketch of each rod before testing
- a table showing how much each rod weighed
- a bar graph showing how much each rod bent

Could you tell me which one is correct?

a bar graph showing how much each rod bent