Please choose the correct answer to the question: As Archie walks to the park, he wonders which route would be faster. He decides to walk to the park using different routes and times how long it takes. Which should he do to make his comparison fair?

Answer1: walk to different parts of the park each day Answer2: walk with a different friend each day Answer3: walk at the same speed each day Answer4: walk at the same time of the day

Answer format: answer1/answer2/answer3/answer4