the amount of fertilizer added the height of the fertilized plants the size of each tomato produced the number of tomatoes produced
I gave my students this multiple choice question: One student wrote a report about an investigation in which fertilizer was added to tomato plants. Which information from that student's report would most help a second student repeat the investigation?

Only one answer is correct among these 4 choices:
- the amount of fertilizer added
- the height of the fertilized plants
- the size of each tomato produced
- the number of tomatoes produced

Could you tell me which one is correct?

the amount of fertilizer added