Final answer:
Most modern electricity comes from fossil fuels, specifically coal and natural gas, which comprise a significant majority of the sources for electricity generation in the United States.
Therefore, the correct answer is: option C. Fossil fuels.
Step-by-step explanation:
Today, most of the electricity required for modern amenities comes predominantly from fossil fuels.
This includes resources like coal and natural gas. In the United States, coal contributes to about 44% of the electricity generation, and natural gas accounts for 23%.
Although renewable energy sources, such as wind and solar, have been growing, their contribution to the total electricity generation is still relatively small by comparison.
Historical data also show that the main sources of extrasomatic energy throughout the industrial phase of society have been fossil fuels, with varying contributions from coal, oil, and natural gas.
In recent years, there is an increasing push towards reducing emissions and moving to cleaner energy sources, but as of the date of the information, fossil fuels remain the main source.