Please choose the correct answer to the question: Pedro shook a can of soda. When the soda was opened, foam and soda burst from the can. Which statement best explains what happened?

Answer1: A new substance was formed. Answer2: The gas pressure was released from the can. Answer3: The sugar in the soda turned into a gas. Answer4: The can absorbed heat from the air.

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