Please choose the correct answer to the question: Over time, the ability to ship foods around the world has improved. Which is the most likely effect these shipping improvements have had on people?

Answer1: They have increased the time it takes to shop for food. Answer2: They have decreased the number of grocery stores. Answer3: They have decreased the need for refrigerators. Answer4: They have increased the types of food available for sale.

Answer format: answer1/answer2/answer3/answer4