Please choose the correct answer to the question: A botanist developed a new fertilizer that was tested on different types of plants under different conditions. The results indicated that the fertilizer increased plant growth. Which would be the best way to validate the results?

Answer1: have another lab replicate the tests Answer2: look over the results several times Answer3: develop a new hypothesis to test Answer4: change the procedure

Answer format: answer1/answer2/answer3/answer4