The correct option is
D Both A and C- Conventional sources of energy are generally non-renewable sources of energy as the accumulation or creation of conventional sources of energy takes years, once they are exploited or consumed.
- Fossil fuels are an example of conventional resources. Petrol, diesel, coal, natural gas, etc are examples of fossil fuels that are obtained by the microbial action on the dead matter for a long time.
- They are used as a source of fuel and energy from ancient times and it takes years to form once they are exploited.
Thus, the correct answer is option D.