The summer of 1998 was one of the hottest summer seasons on record. Carbon dioxide gas from cars and industry is a product of burning that produces heat. Carbon dioxide in the upper atmosphere absorbs and re-emits heat radiated from Earth's surface. Radiation on Earth's surface is increasing because of a hole in the ozone layers.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: This in turn causes the average temperature on Earth to rise. Which of the following observations supports that theory?
Possibilities:
- The summer of 1998 was one of the hottest summer seasons on record.
- Carbon dioxide gas from cars and industry is a product of burning that produces heat.
- Carbon dioxide in the upper atmosphere absorbs and re-emits heat radiated from Earth's surface.
- Radiation on Earth's surface is increasing because of a hole in the ozone layers.

Carbon dioxide in the upper atmosphere absorbs and re-emits heat radiated from Earth's surface.