Please choose the correct answer to the 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?

Answer1: the amount of fertilizer added Answer2: the height of the fertilized plants Answer3: the size of each tomato produced Answer4: the number of tomatoes produced

Answer format: answer1/answer2/answer3/answer4