Please choose the correct answer to the question: Helen is preparing a presentation about objects in the solar system. She includes facts about the order of the planets and their distances from the Sun. Which statement could she include in an accurate presentation?

Answer1: Mars is closer to the Sun than Earth. Answer2: Neptune is one light-year from the Sun. Answer3: Jupiter is farther from the Sun than Uranus. Answer4: Earth is one astronomical unit from the Sun.

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