Please choose the correct answer to the question: Plumes of water vapor have been observed rising from the southern polar region of Enceladus, one of the moons of Saturn. A team of scientists proposed an explanation for the plumes and developed a model. They also published calculations based on their model. These calculations would most likely be used for which purpose in future research?

Answer1: testing the hypothesis Answer2: evaluating similar events Answer3: mapping routes for exploration Answer4: checking the validity of observations

Answer format: answer1/answer2/answer3/answer4
Answer: answer2