Final answer:
All the listed options, namely CO2, H2O vapor, methane (CH4), and chlorofluorocarbons are greenhouse gases, so E. All of these are correct.
Step-by-step explanation:
The greenhouse gases include: A. CO2 (carbon dioxide), B. H2O vapor (water vapor), C. methane (CH4), and D. chlorofluorocarbons (CFCs). Therefore, E. All of these are correct. Greenhouse gases are crucial in trapping heat in the Earth's atmosphere, which is vital for maintaining the planet's habitable temperature. However, since the Industrial Revolution, human activities such as burning fossil fuels and large-scale deforestation have increased the concentration of these heat-trapping greenhouse gases, contributing to climate change.