Answer:
The best answer is - C. two-thirds.
Step-by-step explanation:
Nuclear energy provides approximately 70% or two-thirds of the total energy production of France. The rest of the energy production of France comes from fossil fuels and renewable fuels or energy sources.
Fossil fuels are responsible for 7.1% and the other 22.9% are from renewable sources. These data are approximate values on the basis of the year 2018 energy production of France.
So, Nuclear power is the dominant source of energy in France.