Select the correct option to test your answer: A 60 minutes at an altitude of about 400 km B 60 minutes at an altitude of about 500 km C 90 minutes at an altitude of about 400 km D 90 minutes at an altitude of about 500 kmAtmospheric Science Correct Answer: Option C (90 minutes at an altitude of about 400 km) Verified correct option for Everyday Science (Everyday Science).