Which of the following is an example of the effect on human life of weather climate, or other systems in Earth's atmosphere? O A. Clouds in the upper atmosphere are made of ice crystals, while lower clouds are made of water droplets. B. The 2004 Indian Ocean Tsunami killed over 250,000 people. C. Hurricane Katrina devastated the city of New Orleans. D. During the last ice age, the continental glaciers were biggest between 20,000 years ago and 18,000 years ago.​