Please choose the correct answer to the question: Joann is testing soils to see which kind is best for growing marigolds. Which of the following should she do?

Answer1: Plant the marigolds in the same soil, but water some plants more than others. Answer2: Plant the marigolds in one kind of soil, radishes in another, and daisies in a third kind. Answer3: Plant the marigolds three kinds of soil, and give them different amounts of sun. Answer4: Plant the marigolds in three kinds of soil, and give them the same amounts of water and sun.

Answer format: answer1/answer2/answer3/answer4