Renewable fuels release less energy. Car fuel tanks are being made smaller. The demand for gasoline is decreasing. Nonrenewable fuel supplies are limited.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Some of the new cars being made can run on a renewable fuel that is made mostly from corn. Scientists are developing even more renewable fuels to replace gasoline. Why are renewable fuels most likely becoming more important?
Possibilities:
- Renewable fuels release less energy.
- Car fuel tanks are being made smaller.
- The demand for gasoline is decreasing.
- Nonrenewable fuel supplies are limited.

Nonrenewable fuel supplies are limited.