Please choose the correct answer to the question: In which situation would it be an advantage to ship a product by plane rather than by truck?

Answer1: The product is very heavy and relatively large. Answer2: The product is sensitive to changes in pressure. Answer3: The product must be delivered a long distance soon after it is made. Answer4: The product must be delivered to several sites located within a radius of 50 miles.

Answer format: answer1/answer2/answer3/answer4