Please choose the correct answer to the question: A micro-scratch test is able to determine which rock formations deep inside the earth's sub-surface are the hardest and how resistant the formations are to being

Answer1: scratched, fractured or otherwise deformed Answer2: transformed into different minerals Answer3: melted and otherwise liquified Answer4: scratched with ice breakers

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